SEO stands for Search Engine optimization. SEO is designing a Web site so that search engines find the pages easily and index them.  The process is to improve the volume or quality of traffic to a web site from search engines by having a page rank as high up on the results list as possible, or be on the first results page. Typically, the earlier or higher a site appears in the search result list, the more visitors it will receive from the search engine. SEO includes the choice of keywords used in the text paragraphs and the placement of those words on the page, both visible and hidden inside meta tags.  Search engines use different criteria for ranking pages, and those criteria are periodically changed to keep Web page designers from falsely describing their pages and obtaining a permanent, high ranking.