Useful article from Search Engine Land on 5 straightforward & manageable tasks to improve the search engine presence for e-commerce websites.
Here’s the background:
“SEO for large e-commerce websites is a different kind of beast. Not only are you dealing product inventory and adding new pages constantly, but you’re also not the only one responsible for the website. The larger the site, the more hands you have on it — and most of those hands will have little to no SEO knowledge. This means they won’t understand how their changes could impact organic search performance. Even the small changes can have a big impact. Large sites are fighting tooth and nail for visibility on search engine results pages, and the minor things that help SEO — adding in ALT tags, proper structuring of your header tags, etc. — could be the difference between a No. 2 and a No. 1 ranking, which could easily be worth an extra $100,000 in revenue.”
Here’s an article on how to manage your SEO in Magento.