What is ASMR?

In my subjective view, ASMR is 2 things: a sensation and a medium (like music for example).

The sensation itself (ASMR) stands for Autonomous Sensory Meridian Response and is the current (non-scientific) name given to the feeling characterized as a pleasurable tingling sensation felt in the head, scalp, back and other regions of the body in response to visual, auditory, tactile, olfactory, and/or cognitive stimuli, such as crinkling bags, hand movements, whispering and personal attention.

ASMR Audio, the medium, are not only meant to help induce the sensation or "tingles", but also help provide a relaxing, calming and soothing experience for the viewer while helping to relieve their anxiety, stress, headaches, insomnia, to help those suffering with PTSD or depression, to serve as a study aid and much more. It is quite therapeutic, for both the creator and recipient, not much different than the mediums of music and painting.