Media Money with Julia Boorstin

Twitter and Starcom CEOs talk collaboration

Adam Jeffery | CNBC

The massive deal Twitter struck with ad agency Starcom Media Group in April was a key coming-of-age moment for the social media giant, guaranteeing hundreds of millions in advertising dollars in exchange for plum advertising spots for Starcom clients.

The goal was to share information to enable experimentation with a new format.

On Monday, about eight months later, Twitter CEO Dick Costolo spoke with Starcom Media Group CEO Laura Desmond via Skype at Starcom's annual webcast, a conversation that I moderated.

(Read more: Twitter's new 'tailored audiences' seeks you out)

Starcom's Desmond said she was willing to commit to a long-term plan because of the "chance to help influence a product road map as well as have our product roadmap influenced." The idea, she said, was to "put skin in the game around research and trying to understand people better," and to have a relationship that would give Starcom a first look at the things Twitter was doing.

So how has the partnership gone?