Here are all of the definitions of what is seo found on the Internets. Yes, I checked the entire Internet.
search engine optimization
search engine optimization (uncountable)
The use of various techniques to improve a web site’s ranking in search engines in the hopes of attracting more visitors.
[show ▼]1. improvement of a web site’s ranking in search engines
Search engine optimization is a methodology of strategies, techniques and tactics used to increase the amount of visitors to a website by obtaining a high-ranking placement in the search results page of a search engine (SERP) — including Google, Bing, Yahoo and other search engines.
It is common practice for Internet users to not click through pages and pages of search results, so where a site ranks in a search is essential for directing more traffic toward the site. The higher a website naturally ranks in organic results of a search, the greater the chance that that site will be visited by a user.
What Is SEO?
SEO or Search Engine Optimization is the name given to activity that attempts to improve search engine rankings.
In search results, Google displays links to pages it considers relevant and authoritative. Authority is mostly measured by analyzing the number and quality of links from other web pages.
In simple terms, your web pages have the potential to rank in Google, as long as other web pages link to them.