Private account details
Settings → Account holds your name, your account address, phone number and email. These are used for your account, billing and support, and are never shown to customers.
Public details
What customers see comes from Booking Page → Locations — the public address, phone and email you choose to publish.
The one shared field
Your business name is used in both places.
Changing your email
Changing the email you sign in with requires confirming the new address.