# Hubs and Hubs City

Discover focused communities, open their available apps, and understand your Hub membership.

## What is a Hub?

A Hub is a focused community built around a shared interest, purpose, or audience. The **Hubs** area in Chatigram helps you discover the apps that bring those communities together.

Hubs are different from the organization where you manage Chatigram workflows and business conversations. Joining a community does not automatically grant someone access to your organization’s data or connections.

## Discover communities in Hubs City

Open **Hubs** and use **Explore Hubs City** to visit [Hubs City](https://hubscity.com), where you can discover focused communities and choose one relevant to you.

Read the Hub’s description before opening its app. Different Hubs serve different audiences and can have their own membership experience.

## Open a Hub’s app

Community cards can provide **Web**, **iOS**, and **Android** links. Use a link that is available for the platform you need. A **Coming soon** label means that platform’s app link is not yet available.

The web option opens the community’s browser app. Mobile options open the available store links; a Hub’s presence in Chatigram does not mean every platform is already released.

## Join a Hub

Open the Hub’s available app and follow its joining or registration process. Return to Hubs to view your membership state; a **Joined** badge identifies a community where your registration is recognized.

**Joined** means you have already joined that Hub with the account being checked. It is a membership label, not a button you need to select again to join.

## One account, a username for each Hub

You can use your Chatigram account to sign up for or sign in to different Hubs. Each Hub has its own community identity: when joining, follow that Hub’s setup to choose your username.

Your username can be different in different Hubs. For example, you might use one name in a professional community and another in a hobby community while signing in with the same Chatigram account. Joining one Hub does not automatically join all other Hubs or reserve the same username everywhere.

When returning to a Hub, sign in with the same account you used to join it. A different Hub username does not require a separate Chatigram account.

If a membership does not appear as expected, confirm the account used in the Hub and allow the application to refresh its registration state. For a community-specific issue, use the help available in that Hub.

## Choose where your task belongs

Use Hubs for focused communities. Use **Workflows** to build automations, **Marketplace** to find reusable workflow products, and **Inbox** to work with your organization’s conversations.