Now, you might think this is a very silly question but I have been asked this on several occasions and the people who asked are far from silly.
In fact I would say the silly people are the ones who pay a large junk of money on something they know nothing about and DO NOT ASK!
So what is a website. It is a number of files made up of text and images (perhaps some audio/video as well) which sit on a type of computer (known as a server). This computer or server is then set up so the files can be seen by everyone in the world.
So when someone types in webpurity.co.uk or searches for "website design bournemouth" and clicks on our website the internet browser is simply displaying the website files from the server...voila!