The purpose of the private notes is to allow you to add notes to each account, which will be visible in the "Hosting Resources" > "Hosting Аccounts" section of your Account Panel. To add private notes regarding a particular hosting account, you need to go to its Manage screen through the "Hosting Resources" > "Hosting Аccounts" section. Click on the "Account Notes" link, type your notes in the "Private notes" text field, and click the "Save notes" button.
Private notes are personal notes related to a particular hosting account and may contain information which is important to you. Please do not use this field to add notes to the technical support team. Use the "Notes to support staff" section for this purpose.