Making things look good, is important for the read and the writer, in order to have a positive attitude to the text. Therefore, title case is used for titles.
It is important, that the reader understands where a text is heading and to acknowledge, that every reader has its own context. It can be helpful to add a blockquote at the start of a chapter, in order to summaries the content of a chapter from a different perspective than the chapter's title. Creating dedicated articles for subgroups of readers like users or developers, can also achieve this goal as well.
