There are basically two types of search engine optimization. On-page, that deals with everything on your website and, off-page that is concerned with what you do away from your website to bring people to your website.
I have found that many internet marketing entrepreneurs have never really learned or practiced SEO. What may have worked before, may not work now. Search engine optimization is much like continuing education in various professions, you need to keep up to date.
Search engine optimization (SEO) helps you to attract more organic or unpaid traffic to your website. When you know a few simple search engine optimization techniques it can mean the difference between your website getting ranked on the search engines or just being ignored.