To sign up for Google Workspace, you need an internet domain name. It typically takes the form of your organization's name and a standard internet suffix, such as mybusiness.com or stateuniversity.edu. For example, your domain is your-company.com, and you have a website www.your-company.com and email at firstname.lastname@example.org.
You can use a domain name that you already own. Or you can purchase a domain when you sign up for Google Workspace.
Using your domain with Google Workspace services
Choose your domain at sign-up
Sign up for Google Workspace with the domain name you want to use with services, such as Gmail. Use a domain name you own, or purchase a domain at sign-up. Choose the name carefully as it becomes the main brand for your Google services (Gmail or Drive).
Learn more at Choose your primary domain.
Customize web addresses for your primary domain
This lets your users get to their Gmail or websites easy-to-remember addresses as mail.example.com or www.example.com
Learn more at Customize web addresses for Google Workspace services.
Add other domains you own
If you own multiple domains, you can add them to your Google Workspace account. For example, you might have domains for different products, or a state university might own a domain for each campus.
Learn more at Add a domain or domain alias.