What's that symbol?
Well, to those of us "older folks", it's the pound sign on your phone and it's a number sign, as in "we're #1,"

Now, the younger generation has taken over the symbol to become 'Hashtag" used mostly with the social network Twitter.
We've been using Twitter for a while now, but the Hastag thing is rather new to us old radio geeks.
According to Wikipedia, "Hashtags provide a means of grouping such messages, since one can search for the hashtag and get the set of messages that contain it."

Sometimes I just wonder how or why these things come to be, and why the masses grab onto it with glee, but then again, that's just part of our popular culture.
We can embrace it, or we can ignore it.
And we can make fun of it, as you will see on this recent hilarious video from Jimmy Fallon and Justin Timberlake.
Be sure to watch it to the end, because that's the best part.