Everything on the Internet starts with a domain name (yourcompanyname.co.uk or yourcompanyname.com etc) which works like an electronic postbox number. The domain name is stored on a “name server”, which is a computer permanently attached to the internet.

When someone tries to find a web page containing the domain name a “where is it?” message goes to the name server and the search routes through to the right computer – anywhere in the world.

The domain name is the bit immediately after the www in a website address and the bit before the @ in an email address.

The last part of the domain (after the dot) shows which country the domain was registered in and (possibly) what type of organisation it is.