# Hubble - Documentation

## Documentation

- [Welcome to Hubble](https://docs.hubble.vote/welcome-to-hubble.md)
- [Federations](https://docs.hubble.vote/fundamentals/federations.md): Establishes data ownership and serves as the primary vehicle for billing
- [Universes](https://docs.hubble.vote/fundamentals/universes.md)
- [Multiverses](https://docs.hubble.vote/fundamentals/multiverses.md): Sharing data between Universes
- [ActBlue Webhooks](https://docs.hubble.vote/product-guides/actblue-webhooks.md)
- [Mailbox Configuration](https://docs.hubble.vote/product-guides/mailbox-configuration.md)
- [Canvassing](https://docs.hubble.vote/mobile/canvassing.md): Hit the road with Hubble Mobile