The following videos briefly shares how scholarly articles get peer reviewed and the role that this process plays in scholarly research and publication.
"Peer Review in 3 Minutes" (3:15) by libncsu is licensed under CC BY 3.0 BY-NC-SA
The following Wikipedia article has a very nice overview of the scholarly peer review process, as well as it's history. The value in Wikipedia are the sources used to support the article. Pay special attention to these references, as they often provide deeper information and will to these sources.