Mayer calls the shots on product, engineering, and operations for all of Googleís local products, including Google Maps, Google Earth, and local search, and orchestrated the Zagat
acquisition. Sheís one of the companyís most visible spokespeople, a role that will likely grow with media-shy Larry Page at the helm.
The list is compiled by FORTUNE editors, who consider four criteria: the size and importance of the womanís business in the global economy, the health and direction of the
business, the arc of the womanís career (resume and runway ahead), and societal and cultural influence.