One way of increasing sales is by liking products. Linked products are products that are related to a particular product. Using up-sells and cross-sells, you can cross promote your products. They can be added by searching for a particular product and selecting the product from the dropdown list.
Up-sells: are displayed on the product details page. These are products that you may wish to encourage users to upgrade, based on the product they are currently viewing. For example, if the user is viewing the coffee product listing page, you may want to display tea kettles on that same page as an up-sell.
Cross-sells: are products that are displayed with the cart and related to the user’s cart contents. As an example, if the user adds a Nintendo DS to their cart, you may want to suggest they purchase a spare stylus when they arrive at the cart page.
Grouped: Used to make a product part of a grouped product. A collection of related products that can be purchased individually and only consist of simple products. For example, a set of six drinking glasses.