: An ICANN-accredited company (like Namecheap or GoDaddy ) that manages the reservation of domain names.

Good Practices for the Registration and Administration ... - icann

: Provide valid contact details. Using false information can jeopardize your ownership.

: The backend entity that maintains the master database for specific extensions (e.g., Verisign manages .com).

: To avoid spam, opt for "WHOIS Privacy" or "Proxy Registration," which replaces your personal data in public records with the registrar's info.

For higher security, organizations often use EPP status codes to prevent unauthorized transfers and DNSSEC to ensure data integrity. Keeping your domain separate from your web hosting service is also recommended; it allows you to switch hosts easily without moving your digital identity.

: The individual or organization that "owns" or leases the domain.