If an article is peer-reviewed, it means that a board of scholarly reviewers have analyzed the article for quality of research and adherence to editorial standards of the journal before accepting it for publication. This high standard of writing, content, and research quality results in the highest quality scholarly articles on your subject.
If you use materials from peer-reviewed publications, they have been vetted by scholars in the field for quality and importance (SDSU Library, n.d.).
SDSU Library. (n.d.). What is peer review? Retrieved July 14, 2020, from https://library.sdsu.edu/reference/news/what-does-peer-review-mean