Comparison of company revenues with data in WARC’s Adspend Database shows that the duopoly of Google and Facebook will account for approximately 61% of all online advertising expenditure this year, up from 58% in 2016 and 47% in 2012.

As WARC's November Global Ad Trends Report breaks down, the anticipated $133.2bn in combined revenue will equate to a quarter of all adspend worldwide in 2017, up from a fifth in 2016 and just 9.4% in 2012.

The global index of creative excellence in advertising is now part of WARC.

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