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If you don't, you are making yourself more vulnerable to hackers, stalkers and thieves.
Photograph: Sean Gallup/Getty Images
It lets you connect with your friends, know where they are, share where you are and what not! But with anything that powerful, you have to be careful how you deal with it.
An anonymous hacker said they would easily be able to use the information people post in an 'Ask me 10 things' style questionnaire that people post to Facebook and then tag an inordinate amount of friends in. This is because they often include the sort of details many people use for their passwords -- things like their maiden name, first pet, or their favourite album.
Here are 10 things you might want to delete:
1. Birthday
Your birthday is one part of an important puzzle which also includes your name and address, with which people can more easily access your bank account and personal details.
2. Phone number
The best case scenario here is acquiring a polite admirer. Worst case scenario? A stalker who calls you incessantly.
3. Most of your 'friends'
Oxford psychology professor Robin Dunbar theorised that humans can maintain approximately 150 stable relationships. After looking at 3,375 Facebook users, Dunbar found that of their Facebook friends, 4.1 were considered dependable, and 13.6 exhibited sympathy during an 'emotional crisis.'
Getting rid of the deadwood can make for a healthier interaction with social media.
4. Photographs of your child/young family member
Victoria Nash, acting director of the Oxford Internet Institute, posed a really good question on this subject, and it's to do with consent: What type of information would children want to see about themselves online at a later date?
Previous generations never needed to consider this, but the advent of the internet and social media has given this question more importance.
While we're at it, also DO NOT reveal where your child/young family member goes to school. The last thing you want is to give an opportunity for a sex offender to find out where your child attends school.
5. Location services
Location services is only available on Android or iPhones.
In 2015 TechCrunch reported that over 500 million users accessed Facebook solely from their mobile, which means that the same number has the potential to broadcast their location online, and anyone who may or may not wish you harm now knows where are you.
While you are at it, stop tagging your location. People forget the fact that tagging your location at home actually gives away your address.
6. Your manager
This one is a classic. Facebook is a social media platform, and to some degree your interactions ought to be relaxed.
But the CEO of your company can access your wall, he/she has access to every single one of your dodgy status updates -- and yes that includes the one moaning about work.
Yes, you can set your preferences to exclude your CEO from certain update, but isn't that more hassle?
7. When and where you're going for holiday
According to financial website This is Money, travellers who are burgled while they are on holiday may not get their insurance claim accepted if they posted their holiday plans on their social media accounts.
8. Boarding pass pictures
Taking a photo of your boarding pass is often a way to brag about your holiday, but don't be silly! The barcode on your boarding pass is unique to you, and can be used to find the information you gave to the flight company.
9. Your relationship status
If you want to celebrate the blossoming of a new relationship, don't do it on Facebook. It may not work out, and the consequent 'in a relationship' to 'single' status change will make you feel worse than you already do.
10. Credit card details
Never. This is never a good idea.