Spyware is loosely defined as malicious software designed to enter your computer device, gather data about you, and forward it to a third-party without your consent. Spyware can also refer to legitimate software that monitors your data for commercial purposes like advertising. However, malicious spyware is explicitly used to profit from stolen data.
Whether legitimate or based in fraud, spyware's surveillance activity leaves you open to data breaches and misuses or your private data. Spyware also affects network and device performance, slowing down daily user activities.