Open Facebook and go to your profile
Tap the three dots on your profile page
Select Profile and Tagging Settings or Privacy Settings
Set Who can see your future posts to Friends or Only me
Set Who can see your friends list to Only me
Set Who can look you up using your email address to Friends or Only me
Set Who can look you up using your phone number to Friends or Only me
Turn off search engine linking to your profile
Review and limit past posts to Friends or Only me
Change profile photo and cover photo audience to Friends or Only me
Remove or hide personal details from About section
Turn on Timeline and Tagging review
Limit who can post on your timeline
Limit who can see posts you are tagged in
Block specific people if needed
Use the privacy checkup tool in Facebook settings
Set your profile visibility as private as possible in each privacy option