The Project Details section is the first section of the Project Settings that you need to fill-in when creating a new project:

• Name is the what you want to call this project and what is shown in the admin page to distinguish it from other projects.
• Display Name is what your users will see as your project header if there is no header image uploaded.
• Subdomain is where your Kajabi site will be available. This will be your Kajabi site URL (you can mask it with a custom domain). 
• Support Email name and Email address is your help line for your users
• Welcome Email is what your users receive that contains their login details for your membership portal. It can be manually sent or automatically after a purchase, free sign-up or bulk user import.
• You can also prevent users from logging in to your membership portal more than once at the same time.