Organic searches are a way to enter one or a number of search items in a single stream of search results. They appear in the search results due to their relevance to the subject searched for. The decision as to which websites should be included in this search is dependent upon the SEO level of the site or the addition of a paid search ranking. Sites will use content writing that is optimized with search engine words to enable their site to be picked up in such a search. Search engines will clarify which web sites come up as a result of being a paid advertisement and which are organic.