Keylogger or keyboard logging is the way that some hackers do , using this kind of method capturing or recording your information, Using this the person using keyboard is unaware that their doing or actions are currently monitored by someone else.Some keylogger software can access your email,facebook,and bank account etc.using keylogger they can access your confidential or private information and using this the hacker can give message directly to your account and they use this to threats,to get money from you.If you accessing your account in others computer for example computer shop be sure you that the computer has no keylogger so that they cannot access your information or simply by deleting the history of your internet browser by typing control+H then the history of your browser will be deleted so that you are safe