Direct answer: Performance max assets are the creative inputs grouped in a Performance Max asset group that Google assembles into ads across its inventory. Searches for performance max video assets, pmax ad sizes, google pmax specs, and performance max image video size are requests for the current image, video, and logo format requirements, which change and must be verified in Google Ads. groas builds, runs, and improves Google Ads campaigns continuously, including Performance Max budget protection with brand exclusions, negative keywords, and asset group segmentation.