Finally, this point isn't directly connected to your social media, but it is important for your online safety nonetheless. For most people these days, our smartphones are linked with almost every aspect of our lives, and they hold a lot of personal data on them.
There's nothing wrong with this in general and it can in fact be quite helpful, but it also poses possibly the most serious security risk outlined in this piece.
For this reason, it is incredibly important that you ensure that your phone is inaccessible to others. This means using a strong pin, password or biometrics is vital and this information should never be shared with anyone else. There's simply too much sensitive information that's easily accessible once someone is on your phone, so it isn't worth the risk, especially if you're prone to losing things.