Search engine optimization (SEO) or Indonesian SEO is the process of influencing the visibility of websites or web pages in search engine results - often referred to as "natural", "organic" or "earned" results. In general, the earlier (or rank higher on search results pages), and more often sites appear in the list of search results, the more visitors will receive from search engine users, and these visitors can be converted to customers. SEO can target various types of searches, including image search, local search, video search, academic search, news search and industry-specific vertical search engines.