The record store Grooves advertises their presence on Facebook in their shop window in Somerville, Massachusetts, U.S., July 25, 2017. REUTERS/Brian Snyder
Figures Facebook Inc gives advertisers about its potential reach differ from US census data, an investment analyst said, renewing questions about how tech companies verify the value of their digital marketing space.
Facebook, Alphabet Inc's Google and other internet companies have faced persistent scrutiny from advertisers about how many people watch ads online and how to measure their views.
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