# Special Watchers
Bug watcher supports **special watcher types** additionally to users: **external** email addresses, **project roles** and **groups**.
### External Watchers
Manage non-Jira users as **project** or **filter watchers**. Notification of external users is a long-awaited feature request by the Jira community. Bug Watcher allows **users with Manage Watchers permission** to add **external email addresses** to project watchers.
These external users will receive notifications for events where watchers are set in the Notification Scheme of the project.
Additionally to projects, Bug Watcher allows you to **add external watchers to** your **filters**.
{% hint style="info" %}
**Example Use Case**
Your company has many customers to **collaborate** with. You set up a Jira project for your customers. You want to make sure that contacts of your customer **receive notifications** on key events made to their issues.
Instead of manually notifying the external users, you **add them as project watchers**.
As a result, your **external users** will **receive emails** on key events.
{% endhint %}
{% hint style="info" %}
**Example Use Case 2**
Your company has many customers to collaborate with via a single **Help Desk** project in Jira. You store the **name** of the customer in a **custom field** of the tickets in your help desk project.
You want to make sure that contacts of all your customers will be **notified** of key events of the issues belonging to them.
Instead of manually notifying the external users, you **create** **filters** for each customer and you add the contacts as **watchers of** the corresponding **filter**.
As a result, your **external users** will **receive emails** on key events on the issues that belong to their company.
{% endhint %}
## How to do it?
### Project Roles and Groups as Project Watchers
Project roles and groups can also be set as watchers in the projects or issues.
Go to your Project. Choose **Bug Watcher** icon in the left sidebar and click on **Watches**.
Add users, email addresses, Project Roles and Groups to project watchers in the Manage Project Watchers section
### Issue Watchers Custom field
Add the Issue Watchers custom field and add it to an Issue screen in your Project. You can add special watchers to the issue via the Issue Watchers custom field: users, email addresses, roles and groups.
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