In April 2014 Facebook launched a new tool to help users check their privacy settings. Using a blue cartoon dinosaur, dubbed 'Zuckersaurus-Rex', otherwise known as the 'privacy dinosaur', the social networking company offered a warning to a small number of users before they posted anything publicly.
Five months on and Facebook yesterday began rolling the tool out to the more than 1.2 billion people who are signed up to its service.
If you haven't received a dino-popup yet then you can either wait for it to appear in the next few days or you can click on the padlock icon in the top right corner of your Facebook page and choose Privacy Checkup. It is not yet available in the mobile version of Facebook, so you'll need to access it via your desktop to find it.
Instructions with Screenshots:https://nakedsecurity.sophos.com/2014/09/05/review-your-settings-with-facebooks-new-privacy-checkup-tool/