Generally they want to know is this paper worth publishing and what are things that need fixing, clarification, etc. The reviewers should be people that underst

Generally they want to know is this paper worth publishing and what are things that need fixing, clarification, etc. The reviewers should be people that understand the topics in the paper so they can identify issues, these are usually people that have published articles on similar topics, or people those people recommend. It's more in-depth than grading a paper.