Definition of hot spots:
(n) :
(computing) (Internet, networking) A location in which Wi-Fi Internet access is available.
(n) :
(figuratively) A place notable for a high level of activity or danger.
(n) :
A lively and entertaining place, such as a nightclub.
(n) :
A location which has a higher temperature or amount of radiation than surrounding areas.
(n) :
(firefighting, forestry) A part of a forest fire which is burning actively.
(n) :
(geology, planetology) The surface manifestation of a plume of molten material that rises from deep in a celestial body's mantle.