Very different things which all wear the word "review":
1. Flat statement of facts about the work.
2. Statement of the reviewer's emotional reactions to the work.
3. Actual critical attention. How it works, how it doesn't, how it relates to other works.
Good reviews can involve all three; but most newspaper reviews are nothing but (1) and most online user reviews are nothing but (2).
(I have been impressed with how much of (3) or (1+2+3) there is on Goodreads, but it's still one in twenty.)
A Mastodon instance for maths people. The kind of people who make \(\pi z^2 \times a\) jokes.
\) for inline LaTeX, and
\] for display mode.