Search Engine Advertising (SEA) is a form of online marketing where businesses pay to have their ads displayed on search engine results pages. When users search for specific keywords, these ads appear at the top or bottom of the results, making them more visible. Advertisers typically use a bidding system to compete for ad placement, paying only when someone clicks on their ad. This type of advertising allows companies to target specific audiences based on their search queries. By using keywords relevant to their products or services, businesses can attract potential customers actively looking for what they offer, increasing the chances of conversion.