You can keep track of a review by watching it. When changes are made to the review, you receive email notifications.
For details about managing notifications, see Subscribe to email notifications.
To watch a review:
On the top navigation bar, select a space from the spaces list.
(Optional) To restrict the scope of the search, open a product or Git repository and then a stream/branch.
On the sidebar, select Reviews.
From the review list, open the review you want to watch.
On the review page, click Watch.
To stop watching a review, click Unwatch.