^^^This. If you’re using social media primarily to be in contact w/ family and friends, it’s a good thing. But if your sense of self-worth is how many FB friends or Twitter followers or YouTube subscribers you have, then you have a problem. Also, you have a problem if your use of social media consumes all the time you should be using to be doing constructive activities (and yes, I know many companies actually use social media to do recruiting and such, but still - many times, social media is simply a distraction from something else). And the majority of divorce cases now cite Facebook and other social media in the case, so the temptation to lust and greed also permeate social media.
Social media is, in and of itself, morally neutral - just like the Internet as a whole. It can be used for many wholesome and good things, such as staying close to family and spreading the gospel. But temptations run rampant on social media, as well, and so it’s like a double-edged sword. Just be on your guard.