Definition - What does Ad Blocker mean?
Techopedia explains Ad Blocker
Users have a wide range of options for blocking out different kinds of ads. Some programs delete cookies and other Web markers to effectively limit ads. Web proxy programs like Privoxy can be effective ad blockers. Some users will choose to block Adobe Flash in order to block annoying video ads, which are now common on some websites. There are also freeware programs that may use simple principles to block out advertising.