By default, the same description will be used for both Desktop and Mobile devices. Our standard eBay template is mobile optimized, so this usually isn't an issue. There are scenarios though where the description HTML in the e-commerce platform causes the listing to lose its mobile optimization. If so, you can specify a mobile description as follows:

1. Scroll to the Description column group and expand it if required:
   
2. Click the Edit link to edit the Mobile Description field:
   
3. Enter the mobile description then click OK
   
4. Click the Save and Send to eBay button
   

Any product that has a mobile description will use that instead for mobile devices.