While its title may make it seem like it is a process of going over the sprint afterward and determining what went right or wrong and assigning values/ratings/rankings/reviews to the sprint, that’s not the case, as Atlassian points out.
“A sprint review is about demonstrating the hard work of the entire team: designers, developers, and the product owner,” they note. At some companies, “team members gather around a desk for informal demos and describe the work they’ve done for that iteration. It’s a time to ask questions, try new features, and give feedback.”