When you receive an email, you don't only see the email address, you also see a name most of the time. So for example, your customers will see an email from "Zuma Land Shop" instead of an email from "email@example.com" . It looks more professional and we recommend you to do that.
From your Settings in the left sidebar menu, choose the Shop Information card.
Apart from your company's name, you might as well fill in all the public information about your business.