Q&A: How do I add web-site name?
Go to the Website menu in the top left corner and choose Website Admin:
Go to Configuration and then Settings:
Type the website name in the Domain section. Press Apply.
Web-site name is shown on the left in your website header. If Show Logo toggle is on in the Customize menu, the logo will be shown instead of the web-site name. When it is in the off position, web-site name will be shown instead.