In order to optimize your shopping cart website, you may begin by using tags with your keywords on the title so that you will get a good search engine ranking. The texts on your headers (H1 and H2) are essential, and they have to be keyword friendly and should reflect the tags on your title. Then, add the keywords in the meta description of your site. Make sure that the description will catch the attention of the readers when they see it on search engines. These are just the basics of seo strategies. Hope this helps...
Let me know if you having knowledge of Internet Marketing- SEO? I think if you have a e-com website it will be better for you to go for any good SEO Company to get sales.
I think, you should consider this things : Add a Sitemap Product name in Title Product name in Text Product name in ALT Product name in URL Different pages with quite good colors Use Local Keywords Diversify content on product page Internal Links with Theme-wise Structure Category based Searches I hope it can be useful for your e-commerce website.
try to by some backlinks for main pages and then try formal seo techniques. I don't preffer any tool or software for backlinking.