Notes can be a powerful tool to add a dated record of useful details to your keywords.
Notes can be added by clicking the 3-dots menu and then + New Note.
This will open up a text box where you can enter the note, and a date can be selected in the calendar window, with the current date being the default.
Notes can be deleted by hovering over the note and clicking the 'X' that appears, then clicking 'Delete'.
Notes can be edited by simply clicking on the note text to edit the text, then hitting enter to save.
Clicking the date will allow you to select a new date, then click 'Apply New Date' to save.