There are lots of kinds of spyware, however the most common is probably adware. web link Adware is a kind of software application that is utilized to track a user's online activity and display screen advertisements. It can be set up on a computer without the user's knowledge, and it can be challenging to remove. Other common kinds of spyware consist of keyloggers, which are used to track a user's keystrokes, and Trojans, which are utilized to take personal details.