What is the purpose and function of an appendix in a report?

The purpose of an appendix in a report is to provide supplementary information that supports the main content of the report. It includes detailed data, charts, graphs, or other materials that are referenced in the main body of the report but are too lengthy or detailed to be included in the main text. The function of an appendix is to enhance the reader's understanding of the topic and provide additional context or evidence for the information presented in the report.