An appendix is a section at the end of a book, article, or report that provides additional information, such as:
* Supporting data: Charts, graphs, tables, or raw data that supports the information presented in the main text.
* Detailed explanations: More in-depth explanations of complex concepts or processes mentioned in the main text.
* Historical background: Information about the context or origins of the topic.
* Glossary: Definitions of specialized terms used in the main text.
* Bibliography: A list of sources used in the writing of the main text.
By providing this extra information, the appendix helps readers gain a deeper understanding of the subject matter and can be particularly helpful for academic or technical writing.