Yes. This means you can add it to all pages on your website but only need to edit it in one place for the changes to apply across the whole site.
The Emergency Notification Module includes a Whitelist / Blacklist feature that can be used to limit or control which pages the module is displayed on. We recommend adding the module to every page on your website using HubSpot’s global HTML fields and using the modules built-in features to set which pages it appears on.