I have Facebook, which I use to keep up with friends and loved ones that I don't get to see as often.
I run a FB business page for my business, and moderate the page for my church. Facebook has been a critical instrument for growth. It's how most people find us, and know that we are alive and active as a church or business.
I am rarely, though, on my phone.
Of course I'd have no problem dating someone who didn't have a social media account. Though I have to admit that having no way to verify that a man is who he says he is would make me cautious. One of the first red flags for a catfish or married cheater is that they tell you they don't do social media, or they have an impersonal account that doesn't include any of their family members or real-life friends. This doesn't mean they aren't for real. But it is something to watch out for.