Often, you will see a directive in your syllabus or assignment description to seek out peer-reviewed articles. Sometimes these might be described as scholarly resources.
As the name suggests, peer-reviewed items have been written by an expert and have been reviewed by other experts before being published. This review process ensures the quality of information in the article.
The Library subscribes to a large number of journals, newspapers and other resources. Not all articles are peer-reviewed, so you need to find a way to limit your results to peer reviewed articles.
Omni Search with Peer-Reviewed Filter Selected

"I've found a great article, but I don't know if it is peer reviewed" By using a resource called Ulrich's International Periodical Directory, you can check to see if the article's journal is peer-reviewed.
appears by the journal title in the peer reviewed column, then the title is peer reviewed.