The purpose can mention goals that include fixes to bugs, addition of features, and other improvements, etc.
This section should provide a short summary of the changes made such as improved speeds or features, and implementation details.
The changes are a list of general edits made to the files and their respective components such as:
file_path1:function_module_etc: changed loop to mapfunction_module_etc: changed variable value
file_path2:function_module_etc: changed loop to mapfunction_module_etc: changed variable value
The notes provide any additional text that do not fit into the above sections.