Search anything you want and it pulls up various social media crap while it happens. This service seems pointless at first but I found it useful for when my Netflix went down. At the time I wasn't sure if it was just my service or if the whole site was down... so I checked google and was slammed with a **** ton of people bitching about the outage. Personally, I hate social media sites but I have to admit that it served it's purpose... once.
Next time you're at a computer wondering WTF is going on with _____ right now... try Google Realtime. Or if you're just bored put random words into the search and see what the masses are tweeting.