Before you accept or decline an invitation to review, consider the following questions:
Respond to the invitation as soon as you can (even if it is to decline) – a delay in your decision slows down the review process and means more waiting for the author. If you do decline the invitation, it would be helpful if you could provide suggestions for alternative reviewers.
If you accept, you must treat the materials you receive as confidential documents. This means you can’t share them with anyone without prior authorization from the editor. Since peer review is confidential, you also must not share information about the review with anyone without permission from the editors and authors.
You might find it helpful to consider the below points before preparing your comments to the editor/author(s):
Research article