Tech: What you need to know in advertising today

"Flexible friends," and everything else that you need to know in advertising today.

We're onto Day Two of Advertising Week New York. That means another day full of long lines, panels and seminars, and of course, cocktails to top it all off.

ICYMI, here are some of the highlights from Day One:

WPP chief Sir Martin Sorrell said that given the recent controversies surrounding them, Google and Facebook should worry about government regulation. "With scale and size comes responsibility," he said in a conversation with New Yorker columnist Ken Auletta.

Unilever marketing chief Keith Weed demanded more accountability from the 'walled gardens' of Facebook, Google, Twitter and Snapchat. "At the end of the day, we've got to see over the walled gardens, and be able to measure across the whole market," he said at the first of his three Advertising Week appearances.

Facebook's vp of global marketing Carolyn Everson talked all things video with Group Nine CEO Ben Lerer. She also announced that Instagram is now up to 800 million monthly active users, CNBC reports.

In other news:

NBCU will start selling ads in top shows like 'This is Us' using the same kind of self-serve software as Facebook. Target has signed on as the first advertiser planning to use its data to buy automated, targeted ads on NBCU.

Facebook has signed a monster global deal to distribute NFL highlights. As part of the new pact, the NFL will post video recaps from all 256 regular season games this season to Facebook, along with clips from the playoffs and Super Bowl.

Apple has ditched Microsoft for Google to power Siri. Search results on Siri, iOS, and Spotlight on Mac will now default to Google's search engine, as opposed to Bing.

Uber CEO Dara Khosrowshahi apologized in an open letter to Londoners following Transport for London (TfL)'s decision not to renew the company's license. He remarked that the company will fight TfL's decision, but acknowledged Uber's past mistakes.

China has blocked messaging service WhatsApp almost entirely. Now Chinese users won't be able to send WhatsApp messages, following this summer's crackdown on multimedia messages and video chats.

Google has launched its $350 (£260) Project Jacquard jacket in collaboration with Levi's, The Verge reports. Its smart sleeves contain sensors woven inside the fabric that allow the user to perform certain actions — pre-set via an app — just by touching it.

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