When you are invited to become an admin of a Facebook Page, you will be notified of this request in your notifications. You can also find it in the "Invite" section under your Pages. To do this, follow these simple steps:
- Log into Facebook
- Select "Pages" on the left side of the screen
- Select "Invitations"
- Click "Accept" next to the admin invite
You are now an admin of the Facebook page! If you have any questions, don't hesitate to reach out to firstname.lastname@example.org.