Benefits of the share preview link
Your reviewers don't need to log in to the CMS to access the preview.
You can set an expiry date for the share preview link.
You can delete the share preview link.
You can share preview links for multiple versions of your page.
This link will always display the latest draft of the content (not the state of the content at the point in time you created the share link).
For example, you create the share link at 9am but then continue editing your page and saving later drafts. If your manager clicks on the share link at 11am, they will see the latest version of the page with the edits you have saved up until 11am.
If you want to create a share link for a particular draft or point in time, you can do this in the Revisions tab.