Webhooks are a method mailfloss uses to send information to other apps quickly when something happens inside of mailfloss. They have a message, or payload, and are sent to a unique URL that you provide. Webhooks, in general, are almost always faster than polling, and require less work on your end.
Webhooks are a new feature to mailfloss. And like all of our new features, we label them as beta. Webhooks are currently in beta and under active development. While we'll make every effort to maintain consistency, updates may contain breaking changes.