You can add notes as reminders, to summarise a section or to compose an answer for a class exercise. Notes can help you revise.
You can change the font type, its colour, size and style.
You can print the note or download it as a word file. You can also delete it by using the dropdown box, select delete then hit the black apply button.
If you are part of a class group your teacher will be able to check your notes (so beware). But you can also use your notes to get feedack from your teacher or submit a task that they have set.