Ad blocking

Ad blocking or ad filtering is a software capability for removing or altering online advertising in a web browser or an application. The most popular ad blocking tools are browser extensions. Other methods are also available. Online advertising exists in a variety of forms, including web banners, pictures, animations, embedded audio and video, text, or pop-up windows, and can employ audio and video autoplay. All browsers offer some ways to remove or alter advertisements: either by targeting technologies that are used to deliver ads (such as embedded content delivered through browser plug-ins or via HTML5), targeting URLs that are the source of ads, or targeting behaviors characteristic to ads (such as the use of HTML5 autoplay of both audio and video).