A phrase used to describe a collection of services offered by a third-party vendor that are designed to assist organizations and businesses to obtain exposure and a better search engine ranking — or placement for their website. Typical search engine services will include search engine optimization (SEO) services and search engine marketing (SEM) services as well as website promotion and website optimization services.
See White hat SEO.
Also see How Web Search Engines Work in the Did You Know ? Section of Webopedia.