The primary function of a browser is to enable users to access, retrieve, and view content on the World Wide Web. Browsers interpret and render HTML, CSS, and JavaScript to display web pages properly. They provide essential features like bookmarking, tabbed browsing, and extensions to enhance the user's experience. Popular browsers include Google Chrome, Mozilla Firefox, and Microsoft Edge. By acting as an intermediary between users and web servers, browsers facilitate the navigation and interaction with various online resources.