Who are you? What are you? Which are you?

This this from David Brooks of The New York Times.
I think it's good to think about.
What kind of agency do you work for?
Who are your clients?
What do they do or make?

"The essential competition in many consumer sectors is between commodity providers and experience providers, the companies that just deliver product and the companies that deliver a sensation, too. There’s Safeway, and then there is Whole Foods. There’s the PC, and then there’s the Mac. There are Holiday Inns, and there are W Hotels. There’s Walgreens, and there’s The Body Shop."