Magroove provides a free custom domain as soon as you sign up for a Magroove Website. This custom domain will look like https://anydomainyouwant.magroove.com. You can set it by going to your My Websites tab in your Magroove for Artists account, select the website you want to set the custom Magroove domain to and go to the tab Domains. There, notice the Purchase Domain field, type the domain you want and you'll see that the first option is free. Select it and it'll be set to your Magroove Website!