Choosing your Domain name is the first step towards getting started on the internet and is an important factor.
It's worth while taking some time to select a name which is appropriate, memorable and which says something about your business or site.
Typically UK businesses will choose a name with a .co.uk extension although others are available for specific reasons e.g. .org for a charity or organisation or .eu if you have a European based commerce site or would like to appeal to that market.