Below are the facebook privacy settings;
1. Determine who can see your old posts
I’m préty sure we’ve all got old Facebook posts that are totally cringe-worthy and we’ll all definitely sleep better at night if we’re certain those old posts don’t get seen by the wrong people.
All you need to do is head to Settings and click on the Privacy menu on the left-hand side. Under the “Who can see my stuff?” heading, you’ll see the option to “Limit The Audience for Old Posts on Your Timeline.”

2. Opt-in For login alerts
You sure don’t want to wait uñil your account is H@cked and family members have to call to ask why you’re posting P@.rnographic pictures on your wall before doing this. It doesn’t even matter how often you use Facebook, everyone should have a log-in alert.
Go to your Settings menu, then click on the Security option at the top left of the screen.
From here, you can set up the alerts to go to the email address or phone number of your choice... Read More from the link below

http://www.mntrendsnews.com/2017/12/facebook-privacy-settings-you-should.html?m=1

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Thanks, that's great info!

The Opt-in For login alerts s a great feature!