To revise items,

1. Go to eBay Magento 2 admin panel.
2. Click on Dashboard present on the left navigation bar.
   
3. Click on Manage Listings (Product Listings) on eBay Multichannel Dashboard.
   
   The eBay Product Listing page appears as shown in the following figure:
   
4. Select the products that you want to revise/update by checking the corresponding boxes.
5. Click the Arrow button next to the Actions list, and then click Revise Item(s).
   
   
6. A Confirmation dialog box appears as shown in the following figure. Click OK. 
   The page appears as shown in the following figure with the status:
   

The selected products get revised on eBay.