Ad Age agency reporter Ewan Larkin demystifies the changing power dynamics at agency holding companies such as WPP, Publicis and Omnicom. Global account leads are becoming more important to agency growth, changing the position of regional and agency brand CEOs.

Plus, Netflix announced it would make ad inventory available through Amazon's DSP. The partnership is a milestone in both companies' ad journeys—read more on the implications. And Goodby Silverstein & Partners named Sarah Thompson as its first-ever CEO. Go inside the reasons why.

Dig deeper on the topics mentioned in this week's episode:

~The meaning of agency holding companies' changing power dynamics

~Dentsu's strategy to stand out amid industry M&A

~Behind the scenes of the updated "How Many Licks" campaign

~Listen to Little Caesar's CMO talk sports marketing strategy