Document titles serve many purposes.
Document titles act as labels in the Binder for your text documents.
They can be revealed in Scrivenings, providing a reminder as to what you intended as an outline.
Document titles can become section headings in your exported manuscript.
Use them to good effect!
Labels in the Binder
Although the document titles appear in the binder, and that's where the structure of your document is most apparent, you can also...