Muret's promotion may also have something to do internal politics – namely his close working relationship with SVP of Ads & Commerce Sridhar Ramaswamy who oversees several key product areas: analytics, commerce and display ads. This is a role Ramaswamy previously shared with Wojcicki before her transfer, and as AdExchanger reported earlier, when he took over full control he brought his own senior engineering team to evaluate the structure of the DoubleClick business and make some changes. That team included Scott Silver and Eisar Lipkovitz, and Paul Muret's appointment may represent a similar dynamic of naming his own guys to lead the display teams.
Otherwise one might have expected another senior DoubleClick engineer to replace Mohan – possibly Brad Bender, whose recent promotion to VP of product management seemed to some to hint at a possible succession plan for Mohan.
The move comes after a long game of "Will he? / Won't he?" during which Mohan evaluated and ultimately rejected other job offers. Several years back he was courted by Twitter for a senior product role, and more recently he considered but ultimately declined a similar position with Dropbox.
With the benefit of hindsight, it may be that as part of his agreement to stay on in June, Mohan arranged to transfer to YouTube to once again work closely alongside his old boss Wojcicki, who sources say has wanted someone in a lead product role anyway. Who better than her old lieutenant on the display ad side?