Search Engine Marketing (SEM) is a digital marketing strategy aimed at increasing a website's visibility on search engine results pages (SERPs) primarily through paid advertising. This method involves the use of paid search ads, pay-per-click (PPC) campaigns, and other advertising models to reach potential customers. SEM allows businesses to bid on keywords relevant to their products or services, ensuring their ads appear when users search for those terms. By strategically targeting specific audiences, SEM helps drive immediate and highly targeted traffic to websites, enhancing brand awareness, generating leads, and boosting sales. It is a critical component of an integrated marketing plan, combining with SEO to maximize a website's reach and effectiveness.