>>If you use the same meta tags throughout and the search engine searches through all the pages shouldn't it improve the rankings dramatically for an html based eccommerce site? Do page specific meta tags get better results? If so why?
>For better results add a ton of Keywords, surf around a bit and look over some sites(Source)Meta tags and see the pile they load on.
Page specific keywords are better because you have more coverage. Even, if you have a VERY specific product/service and you only need a few words to completely target it I would still target different key phrases on each page.
If you have ever looked through your log files you will see that people use very weird search terms. Your goal is to capture as many of the odd searchers as the easy ones. Hope that made sense, it didn't feel like it made sense, its early.