This new feature shows you by category what is trending now. Google said this new top charts feature will, by category, show you "not just what's most searched overall, but what's spiking compared with usual search volumes."
Here is a screen shot of the celestial objects and sports cars section on what is trending there:
You can share these easily on Google+, Twitter or Facebook or embed them on your blog as so:
You can also see the past thirty days of trends and improved the filters and options in the navigation.
So give it a try, it may come in handy for marketers.