SEA stands for Search Engine Advertising, which is a form of online advertising that allows businesses to display ads on search engine results pages (SERPs) based on specific keywords or phrases. SEA is typically a pay-per-click (PPC) advertising model, where businesses bid on specific keywords or phrases and pay each time a user clicks on their ad. The goal of SEA is to drive targeted traffic to a website and generate leads or sales through advertising. Effective SEA campaigns require keyword research, ad copywriting, bid management, and continuous optimization to improve ad performance and return on investment (ROI).