The domain is the name; hosting holds the content
A domain is an address such as example.com. Registration lets you use that name for a period under the extension’s and provider’s terms. Hosting stores and serves your website’s files or application. You can use different providers for registration and hosting.
What DNS does
DNS connects names with technical information. The relevant records tell visitors how to reach your website and other services. Changing the registrar does not require changing hosting, provided that your nameservers and DNS records remain correctly configured.
Email is a separate service
An address such as [email protected] uses your domain but needs an email provider and its own configuration. Registering a domain does not automatically create a mailbox. Preserve email records before migrating a website or changing nameservers to avoid sending or receiving interruptions.
An HTTPS certificate is different too
A certificate enables HTTPS connections for a particular name. Issuing and configuring it depends on your hosting or platform. Registering a domain does not mean your website is published, encrypted or ready for visitors. These separate components must work together.
A simple setup checklist
Confirm your domain, registrant, registration period, hosting and email providers. Record who manages DNS and the certificate. Check availability and renewal pricing, and keep credentials securely accessible only to responsible people.