What is DNS all about?

The easiest analogy is to think of DNS as being the address book for your domain which translates human-readable formats like www.google.co.uk into IP addresses that computers need so they can communicate with other computers. 

DNS and DNS Servers (or name servers), carry out some of the most important tasks on the internet.  Without these systems it would be a lot more difficult - maybe even impossible - to remember website addresses or send emails.