Campaign Automator supports the creation of Responsive Display Ads.
Images for Responsive Display Ads must be landscape or square images. You'll need to select campaign type as Display while setting up the template to be able to create Responsive Display ads.
Note: To create Responsive Display Ads, you'll need public image links, and these public image URLs should end in .PNG, .JPEG, .GIF.
Landscape. If you choose the upload option, keep in mind that your landscape image should have a ratio of 1.91:1 and be greater than 600 x 314. The file size limit is 5120KB.
Square. If you choose the upload option, keep in mind that your square (1:1) image should be greater than 300 x 300. The file size limit is 5120KB.
Note: 1 Landscape and 1 Square image are mandatory to add.
Logo (optional). If you choose the upload option, keep in mind that your logo should be square (1:1) and should be 128 x 128 or greater. The recommended size for the square logo is 1200 x 1200. For best rendering, it is also recommended to add a landscape (4:1) logo, which should be 512 x 128 or greater. The recommended size for the landscape logo is 1200 x 300. For all your logos, a transparent background is best, but only if the logo is centered. The file size limit is 5120KB.
You can find more information on image requirements on Google Ad's official support on this link.