# Phoenix.PubSub v2.3.0 - Table of Contents

> Distributed PubSub and Presence platform

## Modules

- [Phoenix.PubSub](Phoenix.PubSub.md): Realtime Publisher/Subscriber service.
- [Phoenix.PubSub.Adapter](Phoenix.PubSub.Adapter.md): Specification to implement a custom PubSub adapter.

- [Phoenix.PubSub.PG2](Phoenix.PubSub.PG2.md): Phoenix PubSub adapter based on `:pg`/`:pg2`.
- [Phoenix.Tracker](Phoenix.Tracker.md): Provides distributed presence tracking to processes.

- Exceptions
  - [Phoenix.PubSub.BroadcastError](Phoenix.PubSub.BroadcastError.md)