When I say "social network" you probably think Facebook or Twitter. Maybe you've checked out LinkedIn, Pinterest or Tumblr.
What you might not know is that there are hundreds of social networks out there. Don't feel bad if you don't know what they are, though, because keeping track of them is almost impossible.
Some sites are only popular in certain countries or with specific age groups. Some cater toward people with certain interests or hobbies.
The ones I'm going to talk about are ones the kids in your life probably know. However, they aren't that kid-friendly, which means you need to know about them, too. You especially need to know the last one because you don't want kids using it at all.