Upload zip of your creative. It should have one html along with assets (i.e js, css, images, fonts etc).
Enter url of your creative.
Enter value for Left distance from where capture to be started.
Enter value for Top distance from where capture to be started
Enter width of creative between 10 and 1300.
Enter height of creative between 10 and 1080.
Select the loop.
Enter duration of creative in seconds. If your creative has loop then enter duration of only single loop.
Select Ad Delivery Network, if your creative is a banner.
Enter the value of target file size (in KB) between 15 to 1024 KB (or as supported by your delivery network). For Google AdWords, maximum supported file size is 150KB.
Select maximum supported FPS as per your delivery network. For Google AdWords, maximum supported FPS is 5. If you don't have any idea about it then select default value 5.
Select the frames per second. File size of GIF is depend upon the FPS.
Select the value in which GIF has to be animated. Ideally value should be same as Capture frames per second. If you want to reduce file size further, then select lower value for "Capture" FPS and higher value for "Animate" FPS.
Select the quality. File size of GIF is depend upon the Quality.
Select this option to create trasparent gif. Please make sure the background of your creative should have single solid color (for example, black, white etc). It should not have gradient or multiple colors.