What is keylogging used to track?

Keylogging is a method used to track and record the keystrokes made by a user on their keyboard. By capturing this data, keyloggers can gather sensitive information such as passwords, credit card numbers, and personal messages, which individuals may enter on various platforms. This form of surveillance is often employed for malicious purposes, such as data theft or unauthorized access to accounts.

The other options pertain to different aspects of user activity but do not define keylogging specifically. For instance, tracking mouse movements or websites visited by the user involves monitoring behavior that doesn't pertain directly to what is typed, and file downloads focus solely on the files that a user retrieves rather than their keystrokes. Thus, the essence of keylogging centers exclusively around capturing typed input from the keyboard.