Spyware
From Wikipedia, a free encyclopedia written in simple English for easy reading.
Spyware is a category of software for computers. Spyware is software that collects some data, usually without the computer users' knowledge. Very often, this data is then sent over the internet to a third party, which can use it for something. Very often, this is used for marketing.
This short article can be made longer. You can help Wikipedia by adding to it.