MediaMath is a behind-the-scenes player for advertisers at a time when advertising networks, exchanges and platforms are changing the way advertising is bought and consumed. The New York-based demand-side digital media platform monitors activity on ad exchanges, where marketers bid to place ads on publishers' Web sites, and helps them quickly buy the space and the audience they need. The system is helping turn advertising from a job for creative "Mad Men" to a numbers-based "real profession," says MediaMath Chief Executive Joe Zawadzki.
