Makes you an informed researcher/applicant
Provides perspective by situating your work within the knowledge base (theory & practice) of your field
Supports your research idea/proposal or identifies a gap needing further research
Provides ideas for research design; for example, quantitative or qualitative approaches or instruments to use
Provides credibility to grant proposals
Scholarly (aka academic) articles are written by and for academics, researchers, and experts in the specific topic or broader subject area of the article.
Peer reviewed (aka refereed) articles are those which have been reviewed prior to publication by other experts in the topic of the article. Often reviewers are external (not members of the journal's editorial staff or board).
Reports original research or experimentation
Critically surveys and analyzes the current state of published research on a particular topic; doesn't include original research
Describes one or more theories, frameworks, models, etc. and tends not to include empirical data