Get audience reports (v4)

Deprecated: use discovery.audience-reports.get.v5 (discovery_audience_reports_get_v5), which carries no audience topTopic, strongestAudiences or losingGround: nothing measures them. This version reads the same report and answers every audience's topTopic as an empty string and strongestAudiences and losingGround as empty lists. Read a campaign's audience report: brand share, win rate, top competitor, and win and loss drivers for each audience, over the campaign's results window (scope.window): every value as of the window's as-of day, averaged over the conversations dated in the 30 days ending it, every trend one point per day (null for a day whose window holds no conversation the value counts), and every change the value minus its value 30 days before the as-of day (null without one). A share or win rate nothing in scope measured is { kind: absent, reason }, never 0.