There are many possible purposes for this.

Twitter banner image size. The file format should be jpg, png or gif. Keep the twitter profile image area clear of any designs. Twitter rolled out a new feature starting late may 2020:

Whether you want you photo to be as per the size of twitter profile picture, or header, or for the carousels, we have it all. Utilize only the safe zone for design elements. Add personality to your twitter timeline with a custom design, a collage, a logo.

Photos can be in any of the following formats: Your twitter profile picture size should be at least 400 x 400 pixels, and max 2mb. The recommended cover size for twitter is 1500 x 500px.

The maximum image size is 2 mb. You can make your image fit the recommended twitter. Now twitter will place a.

The twitter list cover photo, aka header or banner image. However, don’t be afraid to design larger than the recommended twitter banner dimensions of 1500×500 pixels! Twitter list banner image size.

Header photo recommended dimensions are 1500px by 500px, which has an aspect ratio of 3:1. Covers are not cropped in mobile browsers and apps. The recommended twitter banner size of 500 x 1500 pixels.