A type of virus/spyware that may hide on your computer and records everything you type. If you suspect that you have one,
use the virtual keyboard in your OS. And try to get rid of it by using a good utility like malware bytes.
What are keyloggers?
They are like a virus or spyware on your computer. They keep track of what you type on your keyboard and logs them to use within your system. A good spyware program like Spybot or Super Anti-spyware will find them in a scan and get rid of them. Both are free. A good anti-virus program will sometimes catch them.
Every key you type on the keyboard is captured. Keylogger could come in 2 forms software or hardware.