Number 10 – SEO is not Advertising
Number 9 – SEO has more credibility
Number 8 – SEO has the potential for viral spreading
Number 7 - SEO forces you to organize your site
Number 6 – SEO makes the user experience better
Number 5 – SEO introduces you to Google
Number 4 – SEO establishes authority
Number 3 – SEO builds links to your website
Number 2 – SEO will boost traffic to your site

AND the Number 1 reason why SEO is better...

Whether you are writing an article or book, or recording video or giving a live presentation, you need to show yourself as an authority on your subject, otherwise there is no point. Luckily, if you do even a minimal amount of research on a niche topic, you can sound like you are a full-fledged expert, by using the A.S.K. system for establishing authority:

http://www.youtube.com/watch?v=fA8-C6ut5_0

The first thing you need to do is do exactly as I have done in this article,...