What is the function graphic in the Google Play Store and why do you need it?
The so-called feature graphic is a graphic that is displayed above in your app entry in the Google Play Store. This serves as a presentation and enables you to attract new app users. Alternatively, you can also add an advertising video, which appears above the presentation graphic.
Please note that the graphic must have a size of 1024 x 500 pixels and be in JPEG or PNG format (24-bit). For both the Self-Submission and the Submission Service, a feature graphic is required.