Definition of 

Google Play search
What's 
Google Play search
 : it is one of the possible values for 
Traffic Source
. It means:
Users who visited your store listing by performing a search on Google Play for your app’s name or closely associated brand, then visited your store listing or a mini-detail page, before installing your app, and who didn’t have it installed on any other devices at the time. This does not include visits from ads shown on Google Play search results.
See other fields from 
Store Perfomance 
Explore more Reports from 
Google Play Console