It there is one thing Google knows how to do its advertisement. It is one of the main reasons the tech giant is such a formidable force nowadays. Google’s Play store has become an incredibly popular content hub, not only for apps, but movies and music as well. It was only natural that the company’s unique ad-supported suggestion system find its way to the store sooner or later.
The ads in question will only be present within the search results in much the same way you see results being pushed to Google’s web search. So you might start seeing suggested apps pop-up in you Play Store searches. These will look almost identical to other results but will be marked with a little “Ad” label.
This initial beta test will consist of apps from developers, already using Google’s advertisement platform. It is also important to note that at this time ads will only appear in search results and not on any home page or app section.
Source | Via