BOSTON--(BUSINESS WIRE)--ChoiceStream, a provider of optimized programmatic advertising for brands and agencies, today announced that it has expanded Pollshare, its proprietary data-collecting platform, to aid Canadian brands and advertisers in finding and identifying their target audiences. Already widely used in the United States, Pollshare was built to entertain consumers with polling questions while simultaneously collecting self-declared data for use in clients' brand campaigns. “Nine perc
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