A server is a computer, which is always (24/7) available and connected to the Internet . It usually stores files, which should be available all the time. You can get a shared server or a dedicated server. On a shared server many people store their websites on one server. You can compare this when different family members have separate accounts on one computer. Each person has just access to their own files. On a dedicated server you use all the server power yourself. It is just you who use the computer to store your website on. This is much more secure and should be considered once your website has a decent amount of traffic.
Filed in: Glossary