Merchant API added YouTube Shopping affiliate reporting views and published affiliate developer policies

The Merchant API's October release added YouTube Shopping affiliate reporting in v1alpha, with subscriber counts, commission breakdowns, sub-seller segmentation, four new campaign views and a productType field. Google also published developer policies for the YouTube Shopping affiliate program.

YoutubeProductPerformanceView is deprecated in v1alpha in favour of two newer YouTube product views, so merchants reporting on affiliate performance need to migrate. The release also added Universal Commerce Protocol agentic performance reporting with two views covering checkout and conversion metrics, plus a guide with sample queries.