Want to host more than one website on your Raspberry Pi, without having to pay for multiple IP addresses? You can do this easily using Apache’s name-based VirtualHost configuration feature.
This feature allows someone to connect to your Raspberry Pi (or other server) and get served different content based on the host header they sent with their request. This is automatic, and the user is none the wiser: they simply type your web address in the header, and your server uses that information to decide which website to display. Unless you tell them, they won’t know the Pi is also hosting other content.