Peer-review refers to the process where an author's work is reviewed or vetted by experts in the subject field before it is published in a scholarly / academic journal. This kind of review is often "blind" where the reviewers may not know who the author is and vice versa. The peer-review process helps to ensure that quality of article is good; the hypothesis or research question has merit and the methodology, results and conclusions are appropriate, accurate and reproducible. Although peer review may help to establish credibility, research, data, and knowledge may change over time and you should always use your critical thinking skills when evaluating research.