If you are a user on any application and you have edit permissions, you can comment on individual records in a table.
Comments are displayed in the record's activity feed in its extended format. In the feed, you can see the record comments and the history of changes made on it.
When in an expanded record, you can type a comment in the text box at the top of the activity feed.
You can @mention another user in the comment box by typing the @ symbol. This will give you a dialog that lets you select them.
To post your comment, press the Enter key. When you @mention someone, they will be notified that you mentioned them in the given record.
Comments are stored forever on Workiom, and you can separate comments from history details by choosing the corresponding option in the tabs above the feed.