Note titles can be used to in the same way as you might use an email subject on an email. When creating a new note, you have the option to add a title.
This title will then appear at the top of the note when it has been saved, and when the note appears in other areas—such as a To-do list.
Note titles are optional—you can still save your notes without giving them a title.
And at a later time, the original author of the note can edit the title through the options menu.