Every domain name has a WHOIS listing, which can be searched from the database of registered domains. It is available on the internet for everyone.
If you don't have domain privacy or WHOIS privacy protection then all your contact information (such as name, phone number, address, etc) is available to the public.
With WHOIS protection, your personal information remains shielded and instead, the information belonging to your domain registrar will be visible.
WHOIS privacy/ domain privacy helps you to :
• Control spam and junk mails
• Hide your website from competitors to avoid spamming and market research
• Prevents firms from capturing your personal information and resell it to others
• Keep away stalkers and fraudsters