Pages Editor allows to move comments or reviews between channels, change URL, title or close the discussion.
When you publish any comment (review) on your site, it is automatically linked to the address of the current page without a domain. For example: posting a comment on http://example.com/post?id=5, it automatically linked to /post?id=5, which named channel.
Often happens that an address change on your site, with SEO or switched new platforms. In this case, the comments no longer appear on the new address as the channels do not change automatically.
To restore the comments, you can use "Pages Editor". Just change the channel in accordance with the new values and all comments will be automatically moved.
It is important to understand that the transfer of comments can not be canceled because the old channels without comments will be deleted.