There are numerous types of spyware, but the most common is probably adware. Related Site Adware is a kind of software that is used to track a user's online activity and display advertisements. It can be installed on a computer without the user's knowledge, and it can be difficult to get rid of. click here for more Other typical types of spyware consist of keyloggers, which are utilized to track a user's keystrokes, and Trojans, which are utilized to steal individual details.