https://support.google.com/authorizedbuyers/answer/9115752?hl=en&ref_topic=25762
Open Measurement SDK - Authorized Buyers Help
Learn about viewability measurement with OM SDKThe Open Measurement SDK (OM SDK) allows you to measure viewability for advertisers working with measurement...
open measurement sdkauthorized buyershelp
https://developers.google.cn/ad-manager/mobile-ads-sdk/ios/custom-native-omid
Display-type Custom Native Ad Formats and Open Measurement | Mobile Ads SDK for iOS | Google for...
Implement Open Measurement (OM) SDK for display-type custom native ad formats using Google Mobile Ads SDK for iOS.