SEA stands for Search Engine Advertising. It refers to the practice of placing paid ads on search engine results pages (SERPs) to increase visibility and traffic on a website.

SEA is a form of online advertising that allows businesses to bid on specific keywords or phrases that are relevant to their products or services. When a user searches for one of these keywords or phrases, the company's ad can be displayed at the top or bottom of the search results, along with a link to the company's website.

SEA is usually managed through a pay-per-click (PPC) model, which means that the company pays each time a user clicks on one of its ads. This way, companies can control their advertising costs and only pay for the traffic they receive.

SEA is a popular and effective way for businesses to increase their online presence and reach new customers, especially for those who want to reach a specific audience or increase sales and leads.