A Narrative Review is a "traditional" review that summarizes a body of evidence on a topic using informal methods to find and interpret studies  - offers  "expert opinion"

• summarizes and critiques the body of literature on a specific issue or topic
• research questions tend to be broader and more general
• provides context for research, identifies gaps in the literature, and situates research within an area of study
• often included with introduction to research study
• can be publication in its own right, and provides a deeper look at a specific issue or topic
• can be one or more authors
• can be completed in a few weeks to months