Magento Open Source, 1.9.x

Product Relationships

An easy way to promote products throughout your catalog is to establish relationships between products. The options available are: Up-sell products, Related products, and Cross-sell products.

Related Products

Related products are meant to be purchased in addition to the item the customer is viewing. They compliment, enhance, or add optional features to the product.

Up-sells

Up-sell products are items that are similar, but are perhaps of a higher-quality, more popular, or have a better profit margin than the item the customer is considering.

Cross-sells

Cross-sell products are offered on the shopping cart page as last-minute purchases before the checkout process begins.