GET is an HTTP method used to request data from a specified resource on a server. It is one of the most common methods in web development, allowing users to retrieve information such as web pages, images, and other files. When a GET request is made, the server responds with the requested data, which can then be displayed in a web browser. GET requests are typically safe and idempotent, meaning they do not alter the state of the server and can be repeated without side effects. This makes GET ideal for fetching data without causing any changes, ensuring a smooth user experience in web applications.