Domain name is the address of your website that people type in the browser URL bar to visit your website.

Web hosting (in layman’s terms) is the service of providing storage space for a website or application on a server on the internet. Once your website is made available on the internet, it can be accessed by other computers connected to the internet.

A Corporate email address is meant to build more trust in your company. The email address usually contains the domain name of your organization unlike when you use public email providers e.g. yourcompany@gmail.com or yourcompany@yahoo.com

So when you use a corporate email, you may have something like info@yourcompay.com and an email originating from this address is more trusted than when originating from yourcompany@gmail.com