SERP stands for Search Engine Results Page and is the page displayed by search engines in response to a query by a searcher.
The main component of the SERP is the listing of results that are returned by the search engine in response to a keyword query, although the page may also contain other results such as advertisements.
The results are of two general types, organic (i.e., retrieved by the search engine’s algorithm) and sponsored (i.e., advertisements).
The results are normally ranked by relevance to the query. Each result displayed on the SERP normally includes a title, a link that points to the actual page on the Web and a short description showing where the keywords have matched content within the page for organic results. For sponsored results, the advertiser chooses what to display.