An Internet browser is a software application that allows users to access and navigate the World Wide Web. It interprets and displays web pages, enabling users to view text, images, videos, and other multimedia content. Popular browsers include Google Chrome, Mozilla Firefox, Safari, and Microsoft Edge. Browsers work by sending requests to web servers, which then return the requested information. They also support various features like bookmarks, tabs, and extensions to enhance the browsing experience. Security measures, such as private browsing and pop-up blockers, help protect users while they explore the internet.