Over the past two years, there has been an explosion in the bidstream — or for the layman, the number of ad opportunities available for auction in real time has dramatically increased.
This isn’t because there are suddenly more people on the planet, or users are visiting massively more pages, or the number of ads on pages is abruptly increasing (though it may appear that way if you’re not using an ad blocker).
So, why has the bidstream grown so enormously? Header bidding.
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