Here are the general steps when listing a product to a sales channel:
- Set up the appropriate channel or channels.
- Create a category.
- Create Channel-Specific Publishing Categories
- Add the category to your products either manually or via basket actions.
- Push those products to the channel via basket actions.
- Channel Action: Add Listing
- Channels: [select your channel]
Here is a detailed example on How to List Your Products on Jet.com.
Here is a detailed example on Creating Publishing Categories for Walmart.com.