Ad agencies are facing an increasing number of outside threats to their business model. As a result, many are reaching into the past in an attempt to reinforce their relevance — while some are being forced to by their clients.

A growing number of major brands, including McDonald’s, HP, State Farm and most recently Mercedes-Benz, are demanding bespoke, integrated ad agencies.McDonald's Ronald McDonald Before

Specifically, they want creative department (those that make the ads), the strategy teams, and the media departments (the folks that buy ad space) all under one roof. And ideally, they want teams of specialist ad executives focused only on their business.

To read more about how big marketers like McDonald’s, HP and State Farm are changing the ad agency model as we know it, click here.