Google has just published a SEO Audit (Search Engine Optimization) which analyzes 100 Google product pages, and the results are not as good as expected... it seems Google is not so good at optimizing their own websites (at least, not like seo pros).
Title Tags
Title tags: "html <title>" is one of the most important part of a webpage SEO, well, only 10% of their product pages actually follow "SEO Best practices". Indeed, most of their pages contain only the product name without any keywords or relevant tagline.