# Relay allocations service

> Learn how the Allocations service manages a host and joining players to sessions.

The Allocations service is the entry point for interacting with the Relay service and enables players to create and join sessions powered by [Relay servers](../networking/relay-servers).

The allocation flow, or the [connection flow](./connection-flow.md), is the process by which the Allocations service allocates a host player and any number of joining players to a session.

> **Note:**
>
> For details on API request and response bodies, check out the Relay SDK and the [Relay allocations API](https://services.docs.unity.com/relay-allocations/v1).

## Additional resources

* [Allocating, binding, and joining](./allocating-binding-joining.md)