A web browser is a software application that enables users to access, retrieve, and view content on the World Wide Web. It interprets and displays web pages, allowing users to navigate between them using hyperlinks. Popular web browsers include Google Chrome, Mozilla Firefox, and Safari. Web browsers also support various web standards, including HTML, CSS, and JavaScript, which are essential for rendering web content correctly. They often come with features like bookmarks, tabs, and privacy settings to enhance the user experience while browsing the internet.