SEO is a technique/technology that is used to increase search engine ranking of a website or blog. You can also say that SEO is the process of a website/webpage in search engine’s “natural” or unpaid “organic” search result. Now a days SEO is very famous and useful technology in the markets.

Without SEO your website is nothing. If you have prepared your website and you did not applied SEO on your website then your website is useless. According to me without SEO your website is just white paper. If you want to learn something more about SEO then go to SEOmoz.com.