A server (or web server) is a powerful computer that can store the data for hundreds or even thousands of websites. A Web server sends content to your Web browser by loading a file from a disk and sending it across the network to a user's Web browser. This entire exchange is mediated by the browser and server talking to each other using HTTP.

If you think you may need your own server then you must first decide which sort you need. There are broadly two different types of standard web server, those using Linux and those using Windows as operating systems and the differences between their operation and abilities can be viewed here.