You can read about this feature in the “Features Use Case” section.
To assign a badge to the seller, go to Woo Product Badges, click on Edit on which badge you want to use.
Now scroll down and go to Badge Manager Meta → Select Seller & click on Select Option(s); you will see a list of your shop author click to choose. You can choose multiple sellers for the same badge.
Now click update & now that badge will be visible across all products which are created by the selected authors. So you can see I’ve selected “admin” now visiting any product which is published by “admin” should have the “Top Rated” badge I assigned to the seller.