Your subdomain is part of the URL address you use to access your Zendesk account. Your subdomain uniquely identifies your Zendesk account on the network. The convention for accessing your Zendesk account is https://yoursubdomain.zendesk.com. An example would be https://mayfield.zendesk.com, where mayfield is your subdomain.
When you create a new trial account, Zendesk automatically assigns you a subdomain. It's typically based on the domain name in the email address you used to sign up for the account. You can rename your subdomain if you prefer. Renaming your subdomain changes your account URL address and requires some important reconfiguration steps, so it should be done with caution.
The page also gives you a snapshot of your current configuration. The information is useful if you're looking for ways to optimize Zendesk Support to meet your support goals.
Agents have access to a version of the Admin page that's tailored to their permissions and needs.
To access the Admin home page
In Support, click the Admin () icon in the sidebar.
Tip: Bookmark the page for quick one-click access. The URL is https://yoursubdomain.zendesk.com/agent/admin/overview.