Merchandising is an important step in the development of a product. "Boot Kids Coat Stands with Wellington Boots" has a pretty obvious link to Wellington Boots and Coat Stands, but a less obvious link to umbrella stands, wall clocks, coat racks, and children's toys. There are sales relationships between these products however as this site proves with many people purchasing these items through links on this site. Merchandising must work - selling products related to your main product line and using these products to attract attention to your main product - merchandising is a fantastic tool web-marketers can use to build traffic and make sales.
Finding related products to your main stock item is not that difficult. A quick search on Google for your main product will bring up hundreds of other websites that use web merchandising techniques. These techniques include: