This document provides a comprehensive guide to optimizing an ecommerce website for search engines (SEO). It discusses why SEO is important for ecommerce as most online shopping begins with search. The guide then covers keyword research techniques including using Amazon's search suggestions and categories, competitor websites, Wikipedia, and SEMRush to find relevant keywords for product and category pages. It also provides tips on evaluating keywords based on search volume, competitiveness, and match to the site to determine the best keywords to target.