Google Hotel Ads is a meta search engine similar to Trivago, Kayak or Tripadvisor, so it will present your rate and those of the OTAs by charging a cost per click when a user clicks on the link to the hotel's reservation page.
Over time, Google has evolved and the way hotels appear in search results has changed. Here are some of the items that are now displayed:
Google Street Views
High resolution photos
Google Hotel Ads give you the power to control what appears below your own search results. In fact, you can change the images that appear when a user searches for properties like yours, and you can also incorporate interactive tours into your display.