We have experience optimizing eCommerce shopping carts and know the do's and the don'ts of eCommerce shopping cart SEO. Our experience comes from way back when the internet was a simple place to be found and make money. During those days, our SEO project manager created several multi-million dollar producing eCommerce campaigns. If only it was that easy these days. The fact is, you are competing on a national scale with online competitors you never new existed. What is national in our world you ask. National means your products have keywords that describe them with out geographic terms. Example, if you were to look for a plumber. Are you going to type in "plumber" in Google or "Anaheim Plumber"? Chances are, you used a geographic qualifier (city, state) with a keyword.
Search Engine Factors of Influence
Search engines have matured and are looking for the absolute, most relevant resource (website) for the keywords being used in search so they can display the most accurate results. The only way to get those search engines to understand your products is with a solid amount of unique content. Then you have categorizing. Products always have a top level category, descend down to sub-categories, then end with individual products.