According to Wikipedia, this is what it says:

SEO Search Engine Optimization

Search engine optimization (SEO) is the process of improving the volume and quality of traffic to a web site from search engines via “natural” (“organic” or “algorithmic”) search results.

Usually, the earlier a site is presented in the search results, or the higher it “ranks,” the more searchers will visit that site. SEO can also target different kinds of search, including image search, local search, and industry-specific vertical search engines.

And there are 3 steps involved with this.

1st Step: Must Identify Your Target Market
-> Evaluate what you need to dominate your market

2nd Step: Optimize your site for keywords your target market would use
-> Make your website search engine friendly

Last Step: Track and make adjustments
-> Continue to adjust and improve

To Your Online Success,
Joseph Park