You can download all the information Facebook holds to find out exactly how much they know about you.
To download your information click the arrow at the top right of your Facebook profile.
Select Settings in the drop down menu.
Click Download a copy of your Facebook data at the bottom of General Account Settings.
Click Download Archive.
Enter your passwordwhen prompted.
It’ll take a few minutes for your download to be prepared and you’ll receive a notification and email when it is ready.
Click on the notification and then click on the Download Archive button to complete your download.
Remember your download contains your profile information, you should keep it secure and be careful when how you store and use it.