The act of creating an account on a store's site can be a cumbersome experience that not all buyers want to do. This barrier can reduce conversation rates. Giving buyers the option to place an order without creating an account can recapture lost opportunities to make a sale.
This is typically more important for B2C, though not exclusively. For example, Grainger.com (MRO) offers guest checkout.
|As a buyer, I want to check out orders without having to register for an account||Must|
|COMMERCE-2319||As a buyer, I want to save products to a wishlist even if I don't have an account or am not logged in||Should|
|COMMERCE-3319||As a buyer, I want to convert my "guest" user account into a "real" user account||Should|
|COMMERCE-3320||As a buyer, I want to look up my order details even if I didn't register for an account||Should|