Did you arrive here without any idea what Ingress is? Sympathies.
Ingress is a location-based, augmented-reality mobile game developed by Niantic, the makers of Pokemon Go. Two factions battle for control over the future of humanity: the Enlightened, who seek to advance human knowledge by using alien gifts; and the Resistance, who reject the possibility of a better tomorrow. The game board is the real world around you. You play by visiting parks, community meeting places, public art, and thousands of other locations.