ELI5: Explain Like I'm 5

Wireless triangulation

Wireless triangulation is a way of finding out where something is located. It works by using three different wireless signals (like from a cell phone tower or a wifi router). By measuring how long it takes each signal to reach the object you are trying to locate, a computer can figure out where it is. It is like using three points to mark a spot on a map--that spot must be the location of the object you are trying to find.