Domain Name and Brand Name.

Brands are greatly affected by the ability of the company to obtain the matching domain name. If a company builds a brand around a name to which it does not own the domain name, it can end up directing traffic to another domain owner's site. If it is a competitor, this would be a problem.

Today's advertising development of a great brand is strictly confined to the availability to synchronize the brand with a domain name. Any confusion might result in a competitor gaining valuable internet traffic and possible customers.

Article Source: http://en.wikipedia.org/wiki/Domain_name