Which of the following is NOT a traffic source (i.e. not a “Default Channel Group”)? By vmartinez Which of the following is NOT a traffic source (i.e. not a “Default Channel Group”)? Organic Search Social All of these are traffic sources Impressions Referral Related content Related questions:A practitioner needs to manage overarching frequency…An advertiser is managing a multi-ad group campaign…A marketer notices the bidder is using a different…After you’ve reviewed the contacts and lists for an…