Search Engine Marketing (SEM) is a form of online marketing that involves the promotion of websites by increasing their visibility in search engine results pages (SERPs) through paid advertising.
SEM typically involves the use of paid advertising on search engines such as Google, Bing, and Yahoo, to increase the visibility of a website by placing ads at the top of search engine results pages. It includes the use of paid search ads, and also the use of SEO techniques to improve the ranking of a website in search engine results pages.