Zimmerman advertising was founded by Jordan Zimmerman and is based at www.Inc.com. It is a website that delivers advice, tools, and services, to help business owners and CEOs start, run, and grow their businesses more successfully. You can find information and advice covering virtually every business and management task, including marketing, sales, finding capital, managing people.

It seems to be an ad agency. I simply googled and here is their website: http://www.zadv.com/index.cfm ;)