Ghostery is a privacy-focused browser extension designed to block ads and trackers that collect user data while browsing the internet. By preventing these trackers from loading, it helps enhance online privacy and improve page loading speeds. Users can see which trackers are present on a website and choose to block or allow them. In addition to blocking trackers, Ghostery offers features like a built-in ad blocker and a private search engine. It provides users with insights into their online activity and helps them take control of their personal information, making it a popular choice for those concerned about digital privacy.