Accept the manuscript for review that meets to your expertise
It is possible that when editor of the journal makes contact with you he may not know your area of specialization. So you are asked to accept only that manuscript that meets your specialization. You will be invited for review and in case of non-related manuscript you just decline by sending an email immediately, and then the editor of the journal will make contact with the other reviewers of the journal. If the said manuscript/article meets your specialization then accept the invitation by mail immediately if you are available to review.

Critical Behavior
During the review process make sure the clarity of the review. Means review the paper impartially, clearly and honestly focusing on maintaining the quality of the journal. You need to focus on maintaining the quality of the journal by making a critical review report because author will revise the paper according to the suggestions.

Any manuscripts/articles received for review must be treated as confidential documents. They must not be discussed or disclosed with others except as authorized by the editor. Also you are prohibited to use the information of the manuscript for your own research work.

Any reviewer who feels unqualified to review the research reported in a manuscript or knows that its prompt review will be impossible should notify the editor and withdraw from the review process.

Importance of your review report
Your argument, comments on the paper and the suggestions will be most useful to the editor of the journal to make decision about the article/manuscript. At this point you are requested to conduct the review objectively and your suggestions should be useful to improve the paper quality. Personal criticism of the author is inappropriate. Reviewers should express their views clearly with supporting arguments.

Reviewers are required to provide review based on following principles:
Quality: Clear and rigorous selection criteria which emphasize the identification of quality.
Autonomy: that the decisions of the peer review process are the sole criteria for selecting excellence.
Objectivity: That the process of peer review is free of bias.
Transparent: That the principles which guide decisions concerning the structure and process of peer review are visible.

For review you will be given a deadline. You will have to complete the review process in the given time. Deadlines may be different for different journals. If you cannot complete the review within the given time, inform the editor promptly for more time. 

Submission of Review Report
After the completion of review process, reviewer needs to submit the review report without any delay to the editor, so that the editor may take the decision about the manuscript/article.

Review report must be submitted to