Requesting an approval
On both campaigns and posts, you can request approvals in the right-hand sidebar under the Approvals section. On each approval, you can tweak the following settings:
Due Date: When the approval is due
Context: Any context you'd like to give your approver about the post
Blocking Approval: A blocking approval will stop a scheduled post from automatically posting if it's not approved by the post time
You can delete approvals by hovering over a user’s name and clicking on the red X.
Approving a post
The approver of a post will see the option to "Approve" a post in that same approval section on the right-hand sidebar.
Approvals can also be managed from the approvals page here and notification settings for approvals can be changed here.