Group M: Google, Facebook, Alibaba, ByteDance, and Amazon claimed 46% of global ad revenues in 2020; in 2010, the then top 5, including News Corp, claimed 17% (William Turvill/Press Gazette)

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William Turvill / Press Gazette:
Group M: Google, Facebook, Alibaba, ByteDance, and Amazon claimed 46% of global ad revenues in 2020; in 2010, the then top 5, including News Corp, claimed 17%  —  Five tech companies today account for nearly half of the world's advertising revenue, a report has found.

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