Google's biggest threat in advertising is Amazon, WPP's Sorrell says - CNBC

CNBC

Google's biggest threat in advertising is Amazon, WPP's Sorrell says CNBC Amazon is the biggest threat to Google in search, while Snapchat could be the "third force" in the digital ad market behind the Alphabet-owned company and Facebook, Sir Martin Sorrell, CEO of the world's largest ad firm, WPP, said Wednesday. Sorrell ... and more »

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