An annotated bibliography is a compilation of notes about a source alongside the source's bibliographic information. It differs from a Bibliography, References or Works Cites list that only provides only bibliographic information without any commentary. The annotation is a "note" that explains comments on, or gives your reader a sense of the important takeaways from the source, as well as your learning and use of that source.
An annotated bibliography has two parts:
1. The citations. For this class, these will be in MLA format.
2. The annotations. Each citation is followed by a summary/evaluation of each source citation.