Every Activity and Playlist require cover images. The recommended size for an Activity or a Playlist cover image is 1920 x 1080 pixels.
The cover image is used to present the Activity or Playlist on the platform’s All activities and Playlist sections. You can change a cover image any time later.
The image is also used as a background to automatically generate badge images. Note! Changing the cover image later will not create an updated new version of a badge image.