Item notes have been added to item details, which allows you to write down comments for each SKU, like reminders, context or heads-up to their items transparent to all users, across the system. They are editable in item details and bulk update, visible in item details.
This could be particularly interesting in some different situations, such as how sales and procurement can work together or giving information about stock out or when the stock is back, for sales to inform customers. Sales could share their estimates on how they expect new products to start selling, so buyers can buy as accurately as possible.
The notes are insertable from the sku level in item details and up-loadable on mass level through the bulk update.
Note that notes will not be attached to a specific user or a date stamp. All users have access to this field and all users can make adjustments.
The item notes are also available in the reports and order tabs.
You can have more information about that here.