Content is King
and linking is queen
Content is King. Content is King. Content is King. One can't tell often enough... because there's nothing more convincing for search engines than a lot of content about the term someone's searching for.
Even though many of your visitors might not really read a lot on your site, the ones who get curious about your products will finally appreciate, if they can gather some useful information about it.
Not only to search engines, also to your visitors you can proof to be both: professional and competent. If you can provide well structered information and details about your product an interested Visitor will appreciate it and eventually buy. The same applies to information of any kind.
Be precise. Discribe the item from many points of view. Discribe it thoroughly. Emphasize on important details and point out why your product is the one!