Why can't I see an option to approve a review request?

If you've been tagged by someone to review a change request, but you don't see options in the UI to approve or deny the proposed change, chances are you that you don't have the correct permissions on the space.

To complete a review you require reviewer or above permissions on the space. You can check your permissions by contacting one of your GitBook account admins, or someone who has Creator permissions on the space in question.