Peer reviewed articles, also known as scholarly or refereed articles, have been evaluated by several researchers or subject specialists in the academic community prior to being accepted for publication.
For more information about this process, please see the video below:
Peer review is certainly not a perfect system, but it is the current model for ensuring high quality research in most scholarly journal articles. Read more about Peer Review.
It is important for you to understand the concept of peer review in order to use these sources appropriately in your own research.