Today, we’re announcing the v9 release of the Google Ads API . To use some of the v9 features, you need to upgrade your client libraries  and client code. The updated client libraries and code examples will be published next week.
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  Added support for Performance Max campaigns , a new campaign type that provides a unified buying service to virtually all Google Ads inventory. Performance Max also provides a superset of Smart Shopping Campaign functionality. 
  Added support for conversion goals  to help you organize your conversion actions so that you can more easily optimize toward your advertising objectives. 
  Smart campaigns is in open beta and is now available for all users. We also added a new, more robust suggestion method , which leverages your company’s business details to suggest keyword themes for your Smart campaign. 
  Added support for an App campaign for pre-registration  and the pre-registration ads which helps to gauge interest before an app or a game is available to install. 
  Migrated Video ads from using MediaFileAdVideoAssetAdImageAsset 
  To comply with ATT , ConversionUploadService now supports conversion uploads with BRAID  identifiers (ClickConversion.gbraidClickConversion.wbraidThe Google Ads API now distinguishes between conversions with SKAdNetwork conversion value 0 and conversions with no conversion value present in the postback from Apple. Note that this feature is only available for SKAdNetwork conversions received after September 20th, 2021. 
  Added support for asset sets, which are a collection of assets. They will eventually replace the FeedService 
  Added support for ad customizers for Responsive Search Ads . 
  Added support for warnings for OfflineUserDataJobServiceAddOfflineUserDataJobOperationsRequest.enable_warningsAddOfflineUserDataJobResponse.warning 
  ad_group_ad_asset_viewApp engagement ads  and responsive search ads .Added support for retrieving hotel_reconciliation 
  Added support for customer match rate range  with CreateOfflineUserDataJobRequest.enable_match_rate_range_previewCustomer Match  uploads, which is the number of matched user data rows divided by the total number of Customer Match uploaded rows. 
  Added UserAttribute.shopping_loyaltyUserAttribute 
  Added the following types of assets , which will be available in all accounts by the end of 2021
    
      Price assets 
      Hotel Callout assets 
      Mobile App assets 
      Call assets 
      Call to action assets 
      
 
Where can I learn more? forum .