By Angela Haggerty

WPP chief Sir Martin Sorrell has said he is “puzzled” by some of the debate circulating around transparency in the programmatic ad trading market.

Speaking at the Ad Tech conference in London he decribed WPP’s trading desk Xaxis as an “agnostic” proposition and said when it moved into the space it gave existing clients and opt-in choice rather than opt-out.

“Being agnostic is critical. I have to say I’m a bit troubled by the debate around transparency,” he said.

“The answer to the transparency issue has achieved a little notoriety. We decided to do this on an opt-in basis. We ripped up Read full story ›

Source: The Drum