The two main parts of the annotated bibliography are:
Summary annotation: The summary describes the source and it's main ideas. Some of the information that could be included are: the central topic/idea presented in the source, the evidence and examples provided by the author, why the source was created, and who wrote the source.
Evaluative annotation: This includes a summary as listed above but also critically assesses the source for accuracy, relevance, and quality. Is it well-researched? Does it contribute useful information to support your own arguments/ideas? Consider its strengths and weaknesses. Evaluative annotations can help you learn about your topic, develop a thesis statement, decide if a specific source will be useful for your assignment, and determine if there is enough valid information available to complete your project.