The search engine marketing (Search Engine Marketing, or SEM search marketing) is a strategy for promoting a website by making it more visibly in the results of engines like Google, Yahoo or Bing and others. Search Engine marketing includes SEO (Search Engine Optimization, SEO), trade links (Search Engine Advertising, SEA) and, less frequently, by referencing the paid inclusion of a website in a directory of search engine. Search engines selling marketing services to promote your website are mainly sponsored links (advertising links, commercial links). It is by selecting and indexing the best websites and directories that specialize in these areas.
