IAB: US digital ad spend rose 35% YoY to $189B in 2021, the largest gain since 2006; 10 publishers and platforms took 78.6% of the total, up from 78.1% in 2020 (Megan Graham/Wall Street Journal)

Megan Graham / Wall Street Journal:
IAB: US digital ad spend rose 35% YoY to $189B in 2021, the largest gain since 2006; 10 publishers and platforms took 78.6% of the total, up from 78.1% in 2020  —  Advertising has followed shopping online during the pandemic at a breathless rate.  The ad spend was concentrated—78.6% …