Comments system field

The Comments field type is a text area which can be added to Edit and Status Change pages. Unlike other text area fields, a Comments field stores its values in a Comments table. Every time a user enters a new value, Platform adds a new comment record to the table. You can add a Comments table to a View page:

Users can click the comment icon above the Comments table to add a new comment.

You can use Comments fields in templates and formulas. When doing so, the Comments field's value is the text of the most recently created comment.