If you are using both Advocacy and MultiCenter, you can "syndicate", or share, your action alerts with (and between) your centers. You can send out alerts to properly configured centers from All Centers mode, thus providing a common starting point that each center can then brand; or centers can share alerts with one another -- again, saving time in crafting alerts with common themes.
The receiving center can preview each syndicated alert before deciding to accept or reject it. If choosing to accept the alert, centers can then edit the alert before publishing -- perhaps changing such things as the contact email address, the page wrapper, or the autoresponders.
Each center must be configured independently to send alerts, receive alerts, or both. Alerts must be published in order to share them, but they will be received in draft form -- and must be specifically published by the receiving center before they go into use. The Action Alert List in All Centers mode will display every center's version of the alerts.