If you're on a Growing business or Advanced plan, you can change your landing page or website URL by adding your own custom domain. To get started:
Navigate to the Account Settings tab and click the Domains tab.
Scroll down to Sites and click Add domain.
Enter the custom domain you wish to connect.
After adding your domain, click on Manage DNS. A popup window will appear and you will see an A record to add. If you choose to redirect your ‘www’ traffic to the domain you're connecting to, you will see a CNAME record too.
To learn when to add a root domain or subdomain and more on this subject, check out our step-by-step guide on How to add a custom domain to landing pages and websites.