A popup blocker is a software application that is designed to block popup advertisements that you may receive when visiting a wide variety of web sites. Most popup blockers are very easy to install and setup, and can be blocking popups within minutes.

A wide variety of popup blockers are available, but be sure to look for a pop-up blocker that supports your operating system, is configurable (you may want to allow some pop-ups, like those that you receive when logging into an online account), and is easy to toggle on and off as needed.