If you want to maintain your privacy, delete these things immediately from your account
We tend to share every single chores on Facebook happily, but this is not secure and we should avoid sharing our personal life to others specially publicly. Let me tell you what information is shared on Facebook and you should never share these information so that you can play safe.
Your Activity
Whatever you search on Facebook, they knew it and they tend to show you post of similar likes, in other words Facebook already know lot more about you which your close friends never know.
Your Birthdate
Every Facebook user is very delighted to share birthday over Facebook and tend to receive birthday wishes when it comes but it is a dangerous act as it leads to your bank account.
Your Address
If a stranger asks you for your address, you will never give your details but its okay with you to share it on Facebook and you are more than happy to do it. But you are compromising your own security.
School and other information
Facebook already have information about your education and work which is publicly open for others. By sharing these information, people you do not want to talk to would try to engage with you and might hurt you in revenge.
