There are new ads on Google Maps. Until now you could see sponsored links similar to the ones from web search, that sent you to a web page. But this new breed of ads is visible on the map and also has a distinctive icon. When clicked on the ad from the left sidebar, Google shows you information about the business and locates it on the map.
While they have different icons and there's a clear label for "sponsored links", organic search results and paid results are treated the same.