Through our handy Ask The Doctor service, we get a lot of e-mails asking us about HTML5’s effect on Search Engine Optimisation (SEO). While we can’t answer in great detail (Messrs Google, Yahoo, Bing, and their friends haven’t sent us in-depth details of their algorithms), we’ve rounded up some useful facts from Google, the world’s most dominant search engine.

Last month we decided to pull together a post that covered some of the emails that were sent in through the contact page. Since the publication of the last post we have received a lot more questions regarding the HTML 5 spec and have decided that some of these warranted another post.