WHOIS is a tool that allows you to look up information about the ownership and registration of a domain name. When you register a domain name, your personal information, such as your name and address, is stored in a public database called the WHOIS database. The WHOIS tool allows you to search this database to find out who owns a particular domain name and when it was registered.
To use the WHOIS tool, you can enter the domain name that you want to look up. The tool will then search the WHOIS database and return the ownership and registration information for that domain. This information may include the name and contact information of the domain owner, as well as the name of the domain registrar and the date the domain was registered.
The WHOIS tool can be useful for a variety of purposes, such as checking to see if a domain name is available for registration, finding out who owns a particular domain name, or verifying the ownership and registration information for a domain name.