It’s happened to anyone who owns a computer. You’re surfing the internet, looking for that video of the cat falling off the television, when you click on a link and, instead of going to the website in question, a massive pop-up ad appears. If you’re lucky, it’s just a minor irritation that you can close and continue on to the feline hilarity, but more often than not, this action simply opens another pop-up, and then another one, until your taskbar has been cluttered with dozens of flashing advertisements offering herbal Viagra at amazing discount prices.
Most web users ignore the banner advertisements at the top of the screen, so pop-up ads force them to take a moment to look at the incredibly awesome deal in question. What this fails to take into account is the highly negative emotions which are transferred to the subject due to the intrusive nature of the ads. You generally don’t want people associating your product with torn shirts and screams of impotent rage. The fact that many pop-up ads attempt to infect the computers with spyware makes them even more dubious, but rest assured they’ll often provide a pop-up ad offering software to remove the offending programs at the same time.