Google is always doing some experiment to make thing better. Here is something that they did with Google News Search. If you're in the US, you may notice something a bit different when you search Google News.
Last November, Google announced plans to begin experimenting with ads on a number of Google properties, including news query refinements within Google search. Google is continuing a similar experience for users by introducing ads on Google News search-results pages in the US.
What this means is that when you enter a query like iPhone or Kindle into the Google News search box, you'll see text ads alongside your News search results--similar to what you see on regular Google searches or Google Book Search.
In recent months Google has been experimenting with a variety of different formats, like overlay ads on embedded videos from partners like the AP.