In the editor, Add → Online Store has the store widgets: Product Grid, Product Gallery, Variant Picker, Price, Quantity, Add to Cart, Stock Status, Notify Me, Product Details, Related Products, Cart, Buy Button, Category List and Store Search.
The Store item in the left rail has shortcuts: Products (opens the Store in the business app), Product page design, Add a shop page (a page with a Product Grid and filters), Add the cart to the header, and the checkout and account pages' styling.
Product pages
Each site with the store has a Products collection that the Store keeps up to date. The product page is one dynamic page designed once for every product. The collection can't be edited in the CMS: edit products in the Store. Prices and stock on the page are always live.
Checkout
Checkout is on the site's own domain (/checkout), styled from the theme with a logo-only header. For safety, none of the site's custom code, embeds or chat run on it. Only the site's own tracking IDs load there, after the shopper accepts cookies (see Track store sales in Google Analytics, Google Ads, Meta and TikTok). After paying, shoppers see the order's status page and can follow its tracking.
Customer accounts
With the store on, shoppers can make an account: My account → Orders (status, tracking, Reorder at today's prices) and Addresses. Guest checkout stays the default.