SEA, or search engine advertising, is a type of digital advertising that allows businesses to place ads on search engine results pages (SERPs). To use a SEA service, you can start by contacting a search engine advertising company or agency. These companies typically offer a range of services, including ad creation, ad placement, and ad management. Some common search engine advertising companies include Google Ads, Bing Ads, and Yahoo Ads. You can also use a self-serve platform like Google Ads to create and manage your own search engine advertising campaigns.