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        <link:definition>0018 - Disclosure - COMMITMENT AND CONTINGENT LIABILITIES</link:definition>
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        <link:definition>0019 - Disclosure - SHAREHOLDERS' EQUITY</link:definition>
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        <link:definition>0020 - Disclosure - FINANCIAL INCOME (EXPENSE), NET</link:definition>
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        <link:definition>0021 - Disclosure - INCOME TAXES</link:definition>
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        <link:definition>0022 - Disclosure - EARNINGS PER SHARE</link:definition>
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        <link:definition>0035 - Disclosure - SHAREHOLDERS' EQUITY (Tables)</link:definition>
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        <link:definition>0039 - Disclosure - MAJOR CUSTOMERS (Tables)</link:definition>
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        <link:definition>0041 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)</link:definition>
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        <link:definition>0043 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Schedule of Stock-Based Compensation Assumptions) (Details)</link:definition>
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        <link:definition>0044 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Schedule of Fair Value Measurements) (Details)</link:definition>
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        <link:definition>0047 - Disclosure - PROPERTY AND EQUIPMENT, NET (Details)</link:definition>
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        <link:definition>0048 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS, NET (Schedule of Changes in Goodwill) (Details)</link:definition>
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        <link:definition>0049 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS, NET (Summary of Intangible Assets) (Details)</link:definition>
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  <element name="ExercisePriceRangeElevenMember" id="peri_ExercisePriceRangeElevenMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ExercisePriceRangeOneMember" id="peri_ExercisePriceRangeOneMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ExercisePriceRangeOneOneMember" id="peri_ExercisePriceRangeOneOneMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ExercisePriceRangePerformanceBasedOptionsOneMember" id="peri_ExercisePriceRangePerformanceBasedOptionsOneMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ExercisePriceRangePerformanceBasedOptionsTwoMember" id="peri_ExercisePriceRangePerformanceBasedOptionsTwoMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ExercisePriceRangeSevenMember" id="peri_ExercisePriceRangeSevenMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ExercisePriceRangeTenMember" id="peri_ExercisePriceRangeTenMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ExercisePriceRangeTwoMember" id="peri_ExercisePriceRangeTwoMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ExpenseIncurredRelatedToAcquisition" id="peri_ExpenseIncurredRelatedToAcquisition" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FairValueLiabilitiesMeasuredOnRecurringBasisContingentConsiderationInConnectionToAcquisitions" id="peri_FairValueLiabilitiesMeasuredOnRecurringBasisContingentConsiderationInConnectionToAcquisitions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityChangeInFairValueOfContingentConsiderationRelatedToAcquisition" id="peri_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityChangeInFairValueOfContingentConsiderationRelatedToAcquisition" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FairValueOfFinancialInstrumentsAbstract" id="peri_FairValueOfFinancialInstrumentsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="FederalMember" id="peri_FederalMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="FinanceExpenseMember" id="peri_FinanceExpenseMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="FiniteLivedIntangibleAssetsAccumulatedAmortizationAdditions" id="peri_FiniteLivedIntangibleAssetsAccumulatedAmortizationAdditions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FiniteLivedIntangibleAssetsAccumulatedAmortizationOtherComprehensiveIncomeDuringPeriod" id="peri_FiniteLivedIntangibleAssetsAccumulatedAmortizationOtherComprehensiveIncomeDuringPeriod" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="FiniteLivedIntangibleAssetsAccumulatedAmortizationRollForward" id="peri_FiniteLivedIntangibleAssetsAccumulatedAmortizationRollForward" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="FiniteLivedIntangibleAssetsAccumulatedImpairment" id="peri_FiniteLivedIntangibleAssetsAccumulatedImpairment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="FiniteLivedIntangibleAssetsAccumulatedMeasurementPeriodAdjustmentsAdditions" id="peri_FiniteLivedIntangibleAssetsAccumulatedMeasurementPeriodAdjustmentsAdditions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FiniteLivedIntangibleAssetsGrossAcquiredDuringPeriod" id="peri_FiniteLivedIntangibleAssetsGrossAcquiredDuringPeriod" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FiniteLivedIntangibleAssetsGrossAmortization" id="peri_FiniteLivedIntangibleAssetsGrossAmortization" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FiniteLivedIntangibleAssetsGrossMeasurementPeriodAdjustmentsduringPeriod" id="peri_FiniteLivedIntangibleAssetsGrossMeasurementPeriodAdjustmentsduringPeriod" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FiniteLivedIntangibleAssetsGrossOtherComprehensiveIncomeDuringPeriod" id="peri_FiniteLivedIntangibleAssetsGrossOtherComprehensiveIncomeDuringPeriod" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="FiniteLivedIntangibleAssetsGrossRollForward" id="peri_FiniteLivedIntangibleAssetsGrossRollForward" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="FiniteLivedIntangibleAssetsImpairmentAdditions" id="peri_FiniteLivedIntangibleAssetsImpairmentAdditions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FiniteLivedIntangibleAssetsImpairmentAmortization" id="peri_FiniteLivedIntangibleAssetsImpairmentAmortization" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FiniteLivedIntangibleAssetsImpairmentMeasurementPeriodAdjustments" id="peri_FiniteLivedIntangibleAssetsImpairmentMeasurementPeriodAdjustments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FiniteLivedIntangibleAssetsImpairmentOCI" id="peri_FiniteLivedIntangibleAssetsImpairmentOCI" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="FiniteLivedIntangibleAssetsNetAcquiredDuringPeriod" id="peri_FiniteLivedIntangibleAssetsNetAcquiredDuringPeriod" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FiniteLivedIntangibleAssetsNetAmortization" id="peri_FiniteLivedIntangibleAssetsNetAmortization" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FiniteLivedIntangibleAssetsNetMeasurementPeriodAdjustmentsDuringPeriod" id="peri_FiniteLivedIntangibleAssetsNetMeasurementPeriodAdjustmentsDuringPeriod" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="FiniteLivedIntangibleAssetsNetOtherComprehensiveIncome" id="peri_FiniteLivedIntangibleAssetsNetOtherComprehensiveIncome" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="FiniteLivedIntangibleAssetsNetRollForward" id="peri_FiniteLivedIntangibleAssetsNetRollForward" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="GainLossRecognizedInComprehensiveIncome" id="peri_GainLossRecognizedInComprehensiveIncome" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="ImpairmentOfAbandonedProject" id="peri_ImpairmentOfAbandonedProject" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="ImpairmentOfIntangibleAssetsFiniteLivedRollForward" id="peri_ImpairmentOfIntangibleAssetsFiniteLivedRollForward" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ImpairmentOfIntangibleAssetsIncludingGoodwill" id="peri_ImpairmentOfIntangibleAssetsIncludingGoodwill" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="IncomeTaxReconciliationFutureYearIncomeTaxes" id="peri_IncomeTaxReconciliationFutureYearIncomeTaxes" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="IncomeTaxReconciliationIncomeTaxAtRateOtherThanFederalStatutoryTaxRate" id="peri_IncomeTaxReconciliationIncomeTaxAtRateOtherThanFederalStatutoryTaxRate" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="IncomeTaxWithheldDividendDistributionsPercentage" id="peri_IncomeTaxWithheldDividendDistributionsPercentage" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="IncomeTaxWithheldPercentage" id="peri_IncomeTaxWithheldPercentage" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="IncreaseDecreaseInOperatingLeaseLiabilities" id="peri_IncreaseDecreaseInOperatingLeaseLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="IncreaseDecreaseInOperatingLeaseRightofuseAssets" id="peri_IncreaseDecreaseInOperatingLeaseRightofuseAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="InteractiveHoldingCorpMember" id="peri_InteractiveHoldingCorpMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="LesseeLeaseRemainingTerm" id="peri_LesseeLeaseRemainingTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="LiquidatedDamagesAsPercentageOfAggregateSubscriptionAmount" id="peri_LiquidatedDamagesAsPercentageOfAggregateSubscriptionAmount" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="LoanAgreementsMember" id="peri_LoanAgreementsMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="LossAndTimingDifferencesRelatedToPriorPeriodsWhichNoDeferredTaxesWereRecorded" id="peri_LossAndTimingDifferencesRelatedToPriorPeriodsWhichNoDeferredTaxesWereRecorded" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="LossFromDiscontinuedOperations" id="peri_LossFromDiscontinuedOperations" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="MajorCustomerOneMember" id="peri_MajorCustomerOneMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="MaximumContingentConsiderationForAcquisition" id="peri_MaximumContingentConsiderationForAcquisition" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="MaximumPercentageOfDownwardAdjustmentToPurchasePrice" id="peri_MaximumPercentageOfDownwardAdjustmentToPurchasePrice" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="MaximumPercentageOfSubscriptionAmountThatEntityMayIncurAsLiquidatedDamages" id="peri_MaximumPercentageOfSubscriptionAmountThatEntityMayIncurAsLiquidatedDamages" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="MizrachiMember" id="peri_MizrachiMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="NewLoanFacilityMember" id="peri_NewLoanFacilityMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="NumberOfAdditionalLeasePeriods" id="peri_NumberOfAdditionalLeasePeriods" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="NumberOfPeriodsInAdditionalLease" id="peri_NumberOfPeriodsInAdditionalLease" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ObligationRelatedToAcquisitions" id="peri_ObligationRelatedToAcquisitions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="OperatingLeaseRentExpenseSubleaseRentals" id="peri_OperatingLeaseRentExpenseSubleaseRentals" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="OtherComprehensiveIncomeLossDerivativesNotDesignatedAsHedgingInstrumentsNetOfTax" id="peri_OtherComprehensiveIncomeLossDerivativesNotDesignatedAsHedgingInstrumentsNetOfTax" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="OtherGeographicAreaMember" id="peri_OtherGeographicAreaMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="OtherNonOperatingIncomeExpenseOther" id="peri_OtherNonOperatingIncomeExpenseOther" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="PaymentObligationRelatedToAcquisitionNonCurrent" id="peri_PaymentObligationRelatedToAcquisitionNonCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="PaymentsMadeInConnectionWithAcquisitiion" id="peri_PaymentsMadeInConnectionWithAcquisitiion" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="PercentageDownwardAdjustmentToPurchasePriceForOnePercentageDecreaseInPriceOfOrdinaryShares" id="peri_PercentageDownwardAdjustmentToPurchasePriceForOnePercentageDecreaseInPriceOfOrdinaryShares" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PercentageOfReductionInAmountOfTaxOnApprovedEnterpriseIncome" id="peri_PercentageOfReductionInAmountOfTaxOnApprovedEnterpriseIncome" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PerformanceBasedStockOptionsMember" id="peri_PerformanceBasedStockOptionsMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PeriodTakenToCalculateAverageClosingPriceOfOrdinaryShare" id="peri_PeriodTakenToCalculateAverageClosingPriceOfOrdinaryShare" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PeriodTakenToCalculateWeightedAverageClosingPriceOfOrdinaryShareToDownwardAdjustPurchasePrice" id="peri_PeriodTakenToCalculateWeightedAverageClosingPriceOfOrdinaryShareToDownwardAdjustPurchasePrice" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PeripheralRegionsDevelopmentAreaAMember" id="peri_PeripheralRegionsDevelopmentAreaAMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PreferredEnterpriseTaxRate" id="peri_PreferredEnterpriseTaxRate" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PropertyAndEquipmentPercentageOfDepreciationAtAnnualRateTableTextBlock" id="peri_PropertyAndEquipmentPercentageOfDepreciationAtAnnualRateTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PropertyPlantAndEquipmentEstimatedUsefulLivesAnnualRate" id="peri_PropertyPlantAndEquipmentEstimatedUsefulLivesAnnualRate" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PubOceanLimitedMember" id="peri_PubOceanLimitedMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PubOceanMember" id="peri_PubOceanMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ReductionInAccumulatedDepreciationForFullyDepreciatedPropertyPlantAndEquipementNoLongerInUse" id="peri_ReductionInAccumulatedDepreciationForFullyDepreciatedPropertyPlantAndEquipementNoLongerInUse" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="RegistrationRightsAgreementLiquidatedDamagesPaid" id="peri_RegistrationRightsAgreementLiquidatedDamagesPaid" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="RemainingPerformanceObligations" id="peri_RemainingPerformanceObligations" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="RetentionBasedComponentForAcquisition" id="peri_RetentionBasedComponentForAcquisition" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="ScheduleOfAdditionalInformationRelatedToLeasesTableTextBlock" id="peri_ScheduleOfAdditionalInformationRelatedToLeasesTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ScheduleOfComponentsOfIncomeTaxExpenseBenefitByJurisdictionTableTextBlock" id="peri_ScheduleOfComponentsOfIncomeTaxExpenseBenefitByJurisdictionTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="SeptaCommunicationsLLCMember" id="peri_SeptaCommunicationsLLCMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="SeverancePayPolicyTextBlock" id="peri_SeverancePayPolicyTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAggregateIntrinsicValueAbstract" id="peri_ShareBasedCompensationArrangementByShareBasedPaymentAwardAggregateIntrinsicValueAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsEarlyExerciseFactor" id="peri_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsEarlyExerciseFactor" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsForfeitureRatePostVesting" id="peri_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsForfeitureRatePostVesting" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedCompensationArrangementOptionsExercisableDesignatedInMoney" id="peri_ShareBasedCompensationArrangementOptionsExercisableDesignatedInMoney" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedCompensationArrangementOptionsExercisableDesignatedOutOfMoney" id="peri_ShareBasedCompensationArrangementOptionsExercisableDesignatedOutOfMoney" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedCompensationArrangementOptionsExercisableDesignatedOutOfMoneyTotalIntrinsicValue" id="peri_ShareBasedCompensationArrangementOptionsExercisableDesignatedOutOfMoneyTotalIntrinsicValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="ShareBasedCompensationArrangementOptionsExercisedUnderNetShareSettlement" id="peri_ShareBasedCompensationArrangementOptionsExercisedUnderNetShareSettlement" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedCompensationArrangementOptionsOutstandingDesignatedInMoney" id="peri_ShareBasedCompensationArrangementOptionsOutstandingDesignatedInMoney" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedCompensationArrangementOptionsOutstandingDesignatedOutOfMoney" id="peri_ShareBasedCompensationArrangementOptionsOutstandingDesignatedOutOfMoney" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableAbstract" id="peri_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingAbstract" id="peri_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedPaymentArrangementOptionExercisePrice" id="peri_ShareBasedPaymentArrangementOptionExercisePrice" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShortTermDepositsAverageRate" id="peri_ShortTermDepositsAverageRate" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShorttermPaymentObligationRelatedToAcquisitions" id="peri_ShorttermPaymentObligationRelatedToAcquisitions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="StockbasedCompensationExpense" id="peri_StockbasedCompensationExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="StockIssuedDuringPeriodSharesAcquisitionRelatedExpensesPaidByShareholders" id="peri_StockIssuedDuringPeriodSharesAcquisitionRelatedExpensesPaidByShareholders" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="StockIssuedDuringPeriodSharesAdditionalContributionByShareholders" id="peri_StockIssuedDuringPeriodSharesAdditionalContributionByShareholders" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="StockIssuedDuringPeriodValueAcquisitionRelatedExpensesPaidByShareholders" id="peri_StockIssuedDuringPeriodValueAcquisitionRelatedExpensesPaidByShareholders" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="StockIssuedDuringPeriodValueAdditionalContributionByShareholders" id="peri_StockIssuedDuringPeriodValueAdditionalContributionByShareholders" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="StockIssuedDuringPeriodValuePrivatePlacementPriceAdjustment" id="peri_StockIssuedDuringPeriodValuePrivatePlacementPriceAdjustment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="StockOptionPlan2003Member" id="peri_StockOptionPlan2003Member" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="SubsequentEventsScheduleOfAssetsAcquiredAndLiabilitiesAssumedDetailsAbstract" id="peri_SubsequentEventsScheduleOfAssetsAcquiredAndLiabilitiesAssumedDetailsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="SummaryOfSalesGeneratedUnderAgreementTableTextBlock" id="peri_SummaryOfSalesGeneratedUnderAgreementTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="SummaryOfSignificantAccountingPoliciesLineItems" id="peri_SummaryOfSignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="SummaryOfSignificantAccountingPoliciesTable" id="peri_SummaryOfSignificantAccountingPoliciesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" nillable="true"/>
  <element name="SweetImLtdMember" id="peri_SweetImLtdMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TaxBenefitPerBasicShare" id="peri_TaxBenefitPerBasicShare" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TaxBenefitPerDilutedShare" id="peri_TaxBenefitPerDilutedShare" type="dtr-types:perShareItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TaxBenefitPerShareAbstract" id="peri_TaxBenefitPerShareAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TaxesOnIncomeLineItems" id="peri_TaxesOnIncomeLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TaxesOnIncomeTable" id="peri_TaxesOnIncomeTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" nillable="true"/>
  <element name="TradenameAndOtherIntangibleAssetsMember" id="peri_TradenameAndOtherIntangibleAssetsMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TrafficAcquisitionCostsAndMediaBuy" id="peri_TrafficAcquisitionCostsAndMediaBuy" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="TrafficAcquisitionCostsAndMediaBuyCostsPolicyTextBlock" id="peri_TrafficAcquisitionCostsAndMediaBuyCostsPolicyTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TreasurySharesPolicyTextBlock" id="peri_TreasurySharesPolicyTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="VidazooMember" id="peri_VidazooMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="WriteOffToCostOfFullyDepreciatedPropertyPlantAndEquipementNoLongerInUse" id="peri_WriteOffToCostOfFullyDepreciatedPropertyPlantAndEquipementNoLongerInUse" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
</schema>
