What is a scholarly source?
A scholarly publication is one in which the content is written by experts in a particular field of study - generally for the purpose of sharing original research or analyzing others' findings. Typically a scholarly source or article is affiliated with a professor, graduate student, or institution of higher education (college, university, research center...etc)
Peer-review refers to the rigorous process that articles undergo before they may be published. Other scholars in the author's field or discipline review and evaluate the article for quality and validity. If lacking, the article may be rejected, but otherwise, the article is accepted, often with suggestions for revision.