Google definition: “You can see a list of the current top 100 fastest rising search queries in the U.S”

Search queries list is an automated one, and it shows daily top 100 queries (in the US only)

This is an interesting tool, maybe you can find a good niche, or popularity of search terms.
Checkout Google Hot Trends now.

There is also a Google Trends Group, where you can read other users discutions about Google Hot Trends

Read more about Google Hot Trends on Google Blog

Popularity: 48%