Check whether someone is using your Facebook account

Nowadays everyone use Facebook.
Sometimes we use different devices to login to our Facebook account.
For example our friends or the office devices.

So there sometimes we forget to logout from those devices.
So anyone can login to our account and snoop around.

Now you can see what are the devices you logged to Facebook, when and where.
All you need to do is follow these steps.

1.Open Facebook and go to settings.
2.Then go to security and login.
3.There you can see all the devices you logged in.