What is adware?

a computer attack where an attacker accesses a wireless computer network, intercepts data, uses network services, and/or sends attack instructions without entering the office or organization that owns the network.
software that, while purporting to serve some useful function and often fulfilling that function, also allows internet advertisers to display advertisements without the consent of the computer user.
experts in technology who use their knowledge to break into computers and computer networks, either for profit or just motivated by the challenge.
a special class of adware that collects data about the user and transmits it over the internet without the user's knowledge or permission