PoP
Point of presence: a city or facility where a network hands traffic to another network on the path to the user.
Definitions only — a term explained here is not a service we sell.
A point of presence is a city or facility where a network terminates traffic and hands it to another network or to a service. Interconnection defines it, not the building: the same city can host several unrelated points of presence.
A handoff point, not a route
A PoP can be a peering facility, a data-center cage or an operator site. In mobile data it is the gateway or user-plane site where traffic leaves the mobile core; in content delivery it is the edge cache near users. It is a handoff point, not a route, and it does not set a latency figure. Distance sets a floor: light in fiber travels about 200,000 km per second, or 5 µs per km, so 100 km of path adds roughly 1 ms of round trip before equipment delay. The latency entry covers the measurement.