the.com/hotspot

means A localized source of wireless internet access that other devices can connect to, often a phone sharing its mobile data signal.

from Built from 'hot' (active, energized, in American slang stretching back to the early 1900s meaning lively or electrically charged) plus 'spot' (a specific location). The compound first described any place with concentrated activity — a 'crime hotspot,' a 'tourist hotspot' — before computing borrowed it mid-to-late 20th century for a location radiating a wifi signal, and later for the signal itself when phones learned to generate one on demand.