If you often need to retrieve a list of recently changed objects, the CustomerSyncService can help you save many API requests. We’ve made several improvements to this service in AdWords API v201306. These include integration with feed services and exposing ad group bid modifier change information.

Feed Services, first available in v201302, allow you to manage reusable ad extensions in a modular way. The latest changes to the CustomerSyncService enable you to retrieve changes to Feeds using a CustomerSyncSelector. Specifically, you can now retrieve feed update details based on a list of FeedIds you specify.

The other main improvement to the CustomerSyncService is the inclusion of CampaignCriteria which contains ad group-level bid modifiers.

For more information on the AdWords API, subscribe to the Google Ads Developers page and if you have any questions, post them on the AdWords API forum.