Basically, it's a real-time search function. I signed up and asked it to send me an email to let me know any time someone tweets about Holiday World. (Twitter, as you may recall, is a "microblogging" program. You're limited to a maximum of 140 characters for each post, or "tweet.")
It's helpful, as it directs me to folks who are talking about or asking questions about Holiday World. I try not to barge in on conversations, but sometimes it feels appropriate and is welcomed.
I think I'll leave this one alone, though:
As if to welcome me back to the post-holiday world, the cat puked as soon as I got up.