A browser is a software application that allows users to access and navigate the internet. It acts as a gateway, enabling users to search for information, view websites, interact with web-based applications, and consume various types of online content. Browsers utilize search engines to find specific information, display websites using HTML and CSS, and provide tools for bookmarking, managing tabs, and clearing browsing history. They are essential tools for individuals and businesses alike, providing a convenient interface for exploring the vast resources available on the World Wide Web.