Additional creative assets are not required if you create a Performance Max campaign with online sales goals and a Google Merchant Center product feed. However, the more high-quality creative assets you provide for text, images and video, the more ad formats Performance Max can create and the more inventory your ad can appear on. We may help auto-generate the following creative assets on your behalf if you do not add your own: Videos are auto-generated based on the provided text and image assets. Headlines and descriptions are auto-generated based on the provided final URL.