Use your business email on your own domain (e.g., [email protected]).
Your website on your own domain (like www.yourshop.com). A Facebook page or a free address (like yourshop.wixsite.com) doesn't count. If you have no website on your own domain, write NONE.
The carriers' texting registration needs an email on your own business domain (like [email protected]) — OR a website on your own domain, which lets us set that email up for you. One of the two is enough. A free email (Gmail, Outlook…) on its own can't be registered.