Adware, or
advertising-supported software, is any
software package which automatically renders advertisements. These advertisements can be in the form of a
pop-up.
They may also be in the user interface of the software or on a screen presented to the user during the installation process. The object of the Adware is to generate revenue for its author. Adware, by itself, is harmless; however, some adware may come with integrated
spyware such as
keyloggers and other
privacy-invasive software.