The process of listing products depends on whether the product already exists on Amazon:
List products that already exist on Amazon
- visit your products
- click on the search glass icon next to the product you want to list
- select the matching Amazon product from the list of search results
- visit the feeds page - there should be a new pending feed
- wait until the feed has been submitted - or submit the pending feed by clicking "submit feed"
- check if there were any warnings or errors after the feed has been processed
List new products that do not exist on Amazon yet
- enable the required categories in Settings » Categories
- visit your products
- tick the checkbox next to each product you want to list
- select "List on Amazon" from the bulk actions drop down and click "Apply"
- select a listing profile (see below)
- check the prepared listings if everything looks all right
- visit the feeds page - there should be a new pending feed
- wait until the feed has been submitted - or submit the pending feed by clicking "submit feed"
- check if there were any warnings or errors after the feed has been processed
Note: You need to create a listing profile before you can start listing new products. Additionally, each new product needs to have either a UPC or EAN provided on the edit product page.