To review the comments for any course page, select the Comments navigation icon in the left panel. The icon will have a dot if there are new notifications for you. Any comments that are new to you will also have a notification in the comment panel with the name of the user who left you the comment.
When you click on any comment, the block with that comment will automatically scroll to the top of the page so you have the comment in-context while you review the comment. You can then choose to add a reply by typing into the reply box for that comment.
You can also choose to resolve a comment. This is an indicator to your team that the issue has been resolved. Comments only have two states: unresolved or resolved. To resolve the comment, click the check mark in the upper right of the comment.
Note: You can sort the comments panel by date (new to old or old to new) and filter by whether or not the comment is resolved.