What is a keylogger?

[Springy]

Recently i updated my antivirus and found that it detected a keylogger.
What is it?
is it something very dangerous?
I have removed it. is there anything else i need to do?

[Neo]

A keylogger is in my opinion very dangerous. Someone have planted a small program in your computer that logs your keystrokes.

Lets say you login to your bank or paypal or any other important website. When you push something on your keyboard that program logs what you type and sends back to the hacker or individual that planted the program on your computer.

[AllOut]

ya. Keylogger is very dangerous.
It records your keystrokes. Anything that you type ranging from simple emails to your bank and paypal accounts to private loveletters to your GFs. Than it sends to a specified email address.
It can also take screenshots of your screen and send it too.