An annotated bibliography contains a list of references, properly cited, with additional notes describing and evaluating each reference. Why create an annotated bibliography? When working on a research paper, building a bibliography with notes that reflect on how each source could be used for that paper is a helpful practice for building a list of sources while also thinking through how they will work with your paper topic. For example, your annotations can briefly explain how an article or book supports your argument or offers a perspective that your argument takes further or possibly counters. Creating an annotated bibliography helps you to gather support for your own argument and figure out how your argument works in conversation with what other scholars have had to say on the topic.
There are many good sample annotated bibliographies online and explanations of how to build them. A couple of worthwhile examples: