Search engine marketing (SEM) is the practice of using paid advertising to appear on search engine results pages (SERPs). It is a way for businesses to reach their target audience by displaying their ads to users who are actively searching for the products or services they offer. SEM can be an effective way to drive targeted traffic to a website and generate leads or sales. There are several types of SEM, including pay-per-click (PPC) advertising, display advertising, and shopping ads. SEM can be a cost-effective way to increase visibility and reach for businesses of all sizes by targeting specific keywords and demographics.