Facebook recently introduced a new security feature which notifies you via SMS or email whenever someone tries to login or hack your Facebook account using another computer or device.
You can enable this setting from your account settings page. Also you have to add your current computer or mobile device so that if anyone tries to login from a different device, you’ll get a notification from Facebook immediately, and you’ll have a chance to change your Facebook login credentials asap.
An important Facebook feature you should know so that you can get a notification when someone gains access to your Facebook account from a different device.
How To Know When Someone Tries To Hack Into Your Facebook Account
You can enable this setting from your account settings page. Also you have to add your current computer or mobile device so that if anyone tries to login from a different device, you’ll get a notification from Facebook immediately, and you’ll have a chance to change your Facebook login credentials asap.

An important Facebook feature you should know so that you can get a notification when someone gains access to your Facebook account from a different device.
How To Know When Someone Tries To Hack Into Your Facebook Account