Many web sites are set up with dynamic content. However, no type of site has more frequently changing dynamic content than shopping carts. There are many carts on the web, from completely customized carts, to base applications such as OS Commerce to almost fully integrated sites such as eBay stores. The problem with all of these sites though is that the URL structure often has many variables, and the navigation is form based. Both of these issues create problems if not make it all but impossible for spiders to follow and index your e-commerce content.

For a quick analysis, let’s take a look at ECommerce, as that is the most popular shopping cart technology on the planet. It is PHP based software that is incredibly scalable to do what ever a developer wants.

Eliminate the session from the URL string. This can easily create duplicate content. In the admin panel, you can turn on the search friendly URLs, which will then store the session in a cookie.

The Googlebot will not following more than 1 or 2 levels of dynamic content. An easy solution to this might be to simply generate a Google site map and if you are on an Apache server the site map will update every time you update your cart.

Title Tags are a dynamic element which can be taken from your MySQL database product name and added as the Title to your detail pages. For example [ Product Name by Store Name]
Content is still king, if you can get your keywords into the descriptions without forcing the content that may be your best bet of all.

There are many other things you can do, it is just a matter of thinking outside the box to some extent. Think Social Search.