A product page consists at a minimum a product title, product preview image, price, description and "add to cart" button. If you intend to offer real-time shipping quotes or compute shipping fees through the flat fee cart's weight option then a best practice is to display that weight on the product landing page as well. By default, you should also add the product options token so that the store manager can easily add colors, sizes, calendar or any number of options which may or may not modify items prices and weight to their catalog.
Optionally, related products or products using the same tags can also be made to appear easily on your product page. In addition, if you intend to offer price quotes through the built-in quote engine, you should add a quote form token to this page.