What is "annotated bibliography"

n. A bibliography in which each item has an annotation - a brief summary of how each source is useful to an author in constructing a paper or argument.

An annotated bibliography is a bibliography that gives a summary of each of the entries. The purpose of annotations is to provide the reader with a summary and an evaluation of the source. Each summary should be a concise exposition of the source's central idea(s) and give the reader a general idea of the source's content.