How are notifications distances determined?

If I want to send somebody a notification that they are near a beacon, how is that distance determined?Is it by the rssi strength? Or something else?

Hi,

RSSI is used to determine in which proximity zone you are: immediate, near and far. You can read about this in more detail right here: https://community.estimote.com/hc/en-us/articles/201029223-Beacons-signal-characteristics-

Cheers.