Google upgrades hotel search to provide better user experience
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Google announced several upgrades to hotel search features to aid searchers in finding the most economical options for their trips.
Google Hotel search added a nightly rate in the calendar view that shows you a similar grid of prices for the hotel you selected. You can also check out price trends for a hotel to see how rates change over time.
Also, Google formally announced the hotel price labels on the interactive maps in this blog post.