It is the latest innovation in screen technology by Samsung, in true sense it is a display panel capable of HDR10+.
Heard about Blue Light Filters?
How does blue light affect us?
It also reduced blue light emission by the display, which results in a better quality of sleep.
This tech is found in phones like S10, Note 10, Galaxy Flip, Galaxy Fold, S20 Series.
What about HDR10+ ?
HDR vs SDR
It is similar to normal HDR, but the Metadata is Dynamic. This means that HDR was limited to a fixed brightness level when it needed to be high (no matter what the scene may be, this was set by metadata at the start of the movie/video), whereas HDR10+ could have a frame to frame differing brightness and by the virtue of that a better Dynamic Range.
Also, HDR10+ is a trademark of Samsung, It is a direct competitor to Dolby Vision but is royalty free unlike it's competitor.