Damned if I know.
For most of my life, the only time I’ve reviewed anything is when I really didn’t like it. In fact, I had to not like it so much that I felt it was my duty to steer people away. This didn’t happen often.
When I thought something was great, I was never motivated to suggest others buy, use or visit whatever it was. Not unless I was asked. Then, sometimes I wrote a positive review just to be nice.
Basically, this means I don’t understand reviews. Or reviewers.
Read more at Why do people review books?