Your Website Domain.
The domain is how your customer will find you website online. so the shorter and more redeemable you can make it the more clients will find you.

If you are wanting to pull visitors from search engine like Google (and other search engines), then if you domain has a search word in the domain, it is more likely to appear higher up the search listing.
IE If you Searched for 'shopping' on Google, the top 2 links have the word 'shopping' in the domain.

Search for an available Domain name below.: