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 and publish a category, add the first product, and then check that the product is published, belongs to a published category, and is available for ordering.