SEO (Search Engine Optimization)
The practice of improving a site's visibility in unpaid search results.
SEO is the work of earning organic, unpaid visibility in search engines. It spans three broad areas: on-page (the content and structure of your pages), off-page (the links and reputation pointing at them), and technical (how well engines can crawl, render, and trust the site). Unlike ads, the traffic it earns compounds and continues after the work is done.