Spyware is a type of malware (or malicious software) that collects sensitive credentials from a computer system without user’s consent and without the users knowing.
Once installed, it monitors users activities on the computer & internet and then transmits the details to malicious actors. These malicious software can even steal login id, password & credit card information.
While the term spyware suggests software that monitors a user’s computing, the functions of spyware can extend beyond simple monitoring. Spyware can also interfere with a user’s control of a computer by installing additional software or redirecting web browsers. Some spyware can change computer settings, which can result in slow Internet connection speeds, un-authorized changes in browser settings, or changes to software settings.