Managed Domain Name (Recommended)
Have your domain name fully taken care of with Managed Domain Name and DNS
IONOS Domain Name Management
Keep your domain registered in your IONOS Account, and have the Domain name & DNS for your website managed by me as a IONOS Partner.
External Domain Management (Non-IONOS)
Your domain name is registered on another platform but configured on mine.
You manage all your domain settings yourself, including domain registration and DNS.