The Playable Locations API serves collections of curated and generated geographic points (playable locations). Each playable location is chosen by Google based on its suitability for use in location-based games as spawn points for things like repair depots and game prizes (maybe you can come up with ideas for other uses?).
Some playable locations are situated near prominent points of interest, some are located on sidewalks along roadways, while others are randomly located within parks, playgrounds, and town squares, and other publicly accessible areas.
You make calls to the Playable Locations API to receive batches of playable locations as you require them.