Catalog and products
The shop catalog helps the buyer find the needed product and understand what the shop sells.
The detailed seller guide is in Catalog and products for sellers. It explains categories, category fields, products, publication, and checking a product on the storefront.
If you came from the shop launch checklist, start with three things: create a category and check the selected status, add the first product, and then make sure the product is published, its full category path is published, and it is available for ordering. A new root category uses Published by default, so it usually does not need a separate publication step.