Alexa today introduced HotURLs
– it’s a list of web pages that are currently hot on the
Internet in terms of traffic. It displays the most popular pages
visited by Alexa Toolbar users during the last hour and is updated
every five minutes according to Alexa.

What’s Hot on the Web: Alexa

While Alexa Hot URLs is about finding hot web pages, Google Trends is another useful tool to learn about the popular search queries on the web.