VMAF is a tool created by Netflix and some academics which analyses a source video and the encoded video to see how much the encoded video quality differs from the source video it is measuring the similarity between two videos.
VMAF scores range from 0 to 100, with 0 indicating the lowest quality, and 100 the highest. İt is divided in five:
0-20(bad),21-40 (poor),41-60 (fair),61-80 (good) and 81-100 (excellent).
So example score of 94.240835 is somewhere between what humans rated the highest(excellent) and lossless(visual lossless).

Short note: visual lossless is where the source video and the encoded video is indistinguishable to the human eye.