Peer review is the accepted method for ensuring that information is of the highest quality.
Experts in a specific field vet submitted articles using the discipline's strict criteria for quality, relevancy, and timeliness.
However, even though a particular journal is peer reviewed, some articles such as news items, editorials, etc. may not have gone through this process.
Peer reviewed articles (or refereed articles) primarily appear in academic, scientific, or other scholarly publications.