[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["缺少我需要的資訊","missingTheInformationINeed","thumb-down"],["過於複雜/步驟過多","tooComplicatedTooManySteps","thumb-down"],["過時","outOfDate","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["示例/程式碼問題","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間:2025-09-05 (世界標準時間)。"],[[["\u003cp\u003eThis guide helps you troubleshoot low Customer Match rates and debug common errors during integration.\u003c/p\u003e\n"],["\u003cp\u003eLow match rates can stem from data formatting issues, hashing problems, or comparing against different systems.\u003c/p\u003e\n"],["\u003cp\u003eMatch rate and list size differ: match rate includes all matched Google Accounts, while list size only includes active, reachable users.\u003c/p\u003e\n"],["\u003cp\u003eCommon errors like permission issues, conflicting operations, and exceeding user identifier limits are addressed with solutions.\u003c/p\u003e\n"],["\u003cp\u003eFor persistent issues, consult the Customer Match troubleshooter or Help Center for detailed guidance.\u003c/p\u003e\n"]]],[],null,["# Troubleshoot customer list issues\n\nUse this guide to help you troubleshoot low match rates and common errors that\nmight come up in your Customer Match integration.\n\nValidate match rate\n-------------------\n\nEnsure that your upload job has completed before attempting to validate your\nmatch rate.\n\nYour match rate might be lower than expected for a number of reasons, including:\n\n- The data was not hashed before it was uploaded.\n\n- The data was not correctly formatted before it was hashed.\n\n- You are comparing against match rates in a different system.\n\n- You are trying to add multiple user identifiers to a single `UserIdentifier`\n object. Instead, add multiple `UserIdentifier`s to a single `UserData`\n object as shown in this\n [code example](/google-ads/api/docs/remarketing/audience-segments/customer-match/get-started#code_example).\n\nIt's possible for an advertiser to reach anywhere from 1% to 99% of their list,\nbased on how active their users are on Google Search, Gmail, or YouTube. For a\nmore detailed guide on troubleshooting low match rates, visit the [Help\nCenter](//support.google.com/google-ads/answer/7474166).\n\n### Differences between match rate and list size\n\nNote that list size and match rate reflect different values. Match rate\ncounts all users with a Google Account even if they are not actually able to be\nreached with the Customer Match list. List size counts\n[active](//support.google.com/google-ads/answer/7474166?#zippy=%2Ctroubleshoot-low-traffic)\nusers that matched a Google Account and are able to be reached by Ads\npersonalization.\n\nDebug common errors\n-------------------\n\n| Error ||\n|----------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| [`USER_PERMISSION_DENIED`](/google-ads/api/reference/rpc/v21/AuthorizationErrorEnum.AuthorizationError#user_permission_denied) | You might run into permissions errors if you attempt to modify a list that was created by another account. You can only edit a list that your own account created. |\n| [`EXTERNAL_UPDATE_ID_ALREADY_EXISTS`](/google-ads/api/reference/rpc/v21/OfflineUserDataJobErrorEnum.OfflineUserDataJobError#external_update_id_already_exists) | This error can occur if you attempt to create multiple jobs with the same [`external_id`](/google-ads/api/reference/rpc/v21/OfflineUserDataJob#external_id). |\n| [`CONFLICTING_OPERATION`](/google-ads/api/reference/rpc/v21/OfflineUserDataJobErrorEnum.OfflineUserDataJobError#conflicting_operation) | This error can occur if `remove` operations are mixed with `create` operations in a single job. |\n| [`TOO_MANY_USER_IDENTIFIERS`](/google-ads/api/reference/rpc/v21/OfflineUserDataJobErrorEnum.OfflineUserDataJobError#too_many_user_identifiers) | The `create` operations in a single job contain more than 100,000 `user_identifiers` in total. Split the request into multiple requests that don't exceed that limit. |\n| [`CONCURRENT_MODIFICATION`](/google-ads/api/reference/rpc/v21/DatabaseErrorEnum.DatabaseError#concurrent_modification) | This error can occur if you try to operate on the same list at the same time. |\n| [`RESOURCE_EXHAUSTED`](/google-ads/api/reference/rpc/v21/QuotaErrorEnum.QuotaError#resource_exhausted) | This error can occur if you try to send too many requests. You can mitigate this by batching your operations as per the recommended [usage flow](/google-ads/api/docs/remarketing/audience-segments/customer-match/get-started#usage-flow). You can also refer to the best practices guide for [API limits and quotas](/google-ads/api/docs/best-practices/quotas). |\n\nAdditional troubleshooting support\n----------------------------------\n\nIf you're still having issues, reach out to us through the Customer Match\n[troubleshooter](//support.google.com/google-ads/troubleshooter/10028577)."]]