What is HDR and what benefits do you gain from having a TV (or smartphone) that supports it?

High Dynamic Range/HDR: What is the imaging tech, and how does it benefit products from TVs to smartphones?

HDR originated in the world of photography, but has since become a fixture on TVs and smartphones from the most expensive tellies right down to the cheapest ones. But what exactly is it, what does it do and how does it benefit what you watch?
…
Continue here:
https://www.trustedreviews.com/opinion/hdr-tv-high-dynamic-television-explained-2927035