Pop-ups are those annoying advertisements that - as the name says - come on your monitor as you surf the Internet on your browser. Their main purpose is to attract visitors to advertisers' web sites or to collect e-mail addresses.
Some programs can be useful. Sometimes a user clicks a link on the Web page and a small window will open asking a user to fill in information or giving a user more information. Music sites often use this form to play tunes in a specialized player window. This can be a completely legitimate use of pop-ups and is quite different from the ones that run advertisements that appear unbidden.
Another type of pop-up is the pop under. Rather than appearing on top of web pages they're hidden until you close the browser window. These are a little bit less intrusive than the other programs that run but still an unwanted nuisance. There's no end to the cleverness of advertisers!
It's the nuisance factor of pop-ups that has encouraged almost every web browser designer to include some kind of program that will killer in these programs. The latest versions of all the major browsers have integrated pop-up killers.
There are also many specialized pop-up killer utilities that run in the background and require no user intervention, most available free of charge. So, download one today. Unless you just enjoy advertising.
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