When you register a domain name you provide contact information that becomes publicly available in the domain "whois" database. Whois Privacy sets the publicly available information for your domain name to generic information provided by the registrar (in our case the registrar is OpenSRS). The Whois Privacy option prevents your address, phone number, email, etc. from being publicly available. So it protects you from spammers and scammers who scrape the whois database.
Whois Privacy can be ordered when a domain is initially registered, or upon domain renewal. We can also provide Whois Privacy service for domains that are transferred to us (with the exception of the .pro extension, which does not support Whois Privacy).