What is the most common kind of spyware?

According to a report from cybersecurity firm Kaspersky, the most common type of spyware is a trojan called "Trojan-Spy.  https://tourismcrisis.org/?p=1346 As soon as set up on a victim's computer system, the trojan can be utilized to remotely manage the device and collect data from it. https://9tolife.co.uk/?p=1265