Search engine optimization is the process of affecting the online visibility of a website or a web page.

Search engine optimization (SEO) is the process of affecting the online visibility of a website or a web page in a web search engine's unpaid results—often referred to as "natural" "organic" or "earned" results. ... Promoting a site to increase the number of backlinks or inbound links is another SEO tactic.

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 other search engines.