A domain name is a unique address used to access a website on the internet, such as www.example.com. It consists of a name (example) and a domain extension (com).

To register a domain name, follow these steps:

1. Choose a domain name.
2. Check its availability using a domain registrar.
3. If available, purchase the domain through the registrar.
4. Provide your contact information and complete the registration process.

DNS is a system that translates domain names into IP addresses, allowing browsers to locate and load websites. It acts like a phonebook for the internet.

SSL (Secure Sockets Layer) is a security protocol that encrypts data between a user’s browser and your website. An SSL certificate is crucial for securing sensitive information and improving search engine rankings. Most websites should use SSL.

Once a domain is registered, you cannot change it. However, you can register a new domain and set up redirects from the old domain to the new one.