Add‑on domains are top‑level domains that you point to a subdirectory in your current web hosting account. To people visiting that domain in their web browser, it looks as if it is a totally separate website. Of course, this add‑on domain shares the disk space and bandwidth limitations with your main domain, but if you have a family member or friend who wants to have their own website without all the hassle, then an add‑on domain may do the trick. Not every web host permits use of add‑on domains, so if you want to add one, please check with your host first.

You need to make sure that the add‑on domain points to your web host’s nameservers before you add it to your account. Click Addon Domains in cPanel and add the new domain name in the specified field (without www.), create a main username/directory name/subdomain name (one name for all three, which will be created as a directory inside your public_html directory) and a password for that user. The user will be able to FTP...