SERP, short for "Search Engine Results Page", is the listing of results on search engines in relation to a query using one or more keywords that a user has entered. The pages of results that you will see are the SERPs. SerpRank [dot] com is an online SEO tool that will allow you to search the three major search engines of Google, Yahoo and Bing, to check if your website is ranking on the first page of results for your various keywords or search phrases.