An Ad Blocker is a software tool designed to prevent advertisements from appearing on websites. It works by filtering out ad content, allowing users to browse the internet without interruptions from pop-ups, banners, or video ads. This can enhance the overall browsing experience and improve page loading times. Many web browsers offer built-in ad blocking features, while others allow users to install third-party extensions. Some popular ad blockers include uBlock Origin and Adblock Plus. While ad blockers can improve user experience, they may also impact website revenue, as many sites rely on advertising for funding.