Kelly, et al. (2014) describes the importance of peer-review:

Peer review has become the foundation of the scholarly publication system because it effectively subjects an author’s work to the scrutiny of other experts in the field. Thus, it encourages authors to strive to produce high quality research that will advance the field. Peer review also supports and maintains integrity and authenticity in the advancement of science. A scientific hypothesis or statement is generally not accepted by the academic community unless it has been published in a peer-reviewed journal. (p. 229)

References

Kelly J, Sadeghieh T, Adeli K: Peer review in scientific publications: Benefits, critiques, & a survival guide. EJIFCC. 2014; 25:227–43. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4975196

First page of article noted below.

Checklist to evaluate article: FAQ How can I tell if an article is peer-reviewed?

Example Article: Madubata, I., Spivey, L. A., Alvarez, G. M., Neblett, E. W., & Prinstein, M. J. (2022). Forms of Racial/Ethnic Discrimination and Suicidal Ideation: A Prospective Examination of African-American and Latinx Youth. Journal of Clinical Child & Adolescent Psychology, 51(1), 23–31. https://doi.org/10.1080/15374416.2019.1655756

Elements noted:

Five authors affiliated with two universities
9 pages
Abstract: "This prospective study examined... Findings revealed that...."
Sections: Abstract, Introduction, Methods, Results, Discussion, References; 5 tables
Author guidelines: "double blind peer reviewed"

Conclusion: this is a peer-reviewed article