If you happened to land on a mobile game ad on Google’s search results, you will soon be able to test it out for free! That’s right, a free trial before downloading the app and this will surely help! "Search trial runs ads" is how this will be called and it will allow developers to embed demonstrations within ads that you see within search results. Do note that only Android games are concerned till date and more will be revealed by Google in the near future. Stay tuned for more details! 

Search trial runs ads