Researchers may be involved in Peer Review from two different perspectives:
A process of evaluation of scientific or professional work by experts in the same field (reviewers) to assess whether the work meets the necessary methodological and ethical standards before it is accepted or published. The critical assessment of manuscripts submitted to journals by experts who are not part of the editorial staff. The term may also refer to review of clinical performance in a medical audit.
Drubin DG. Any jackass can trash a manuscript, but it takes good scholarship to create one (how MBoC promotes civil and constructive peer review). Molecular biology of the cell. 2011;22(5):525-7.