(A) Website referral traffic
(B) Social media traffic
(C) Google Ads Campaign traffic
Auto-tagging is used to collect Conversion tracking data from Google Ads Campaign traffic to find out how effectively your clicks lead into conversions in the form of transactions, purchases, email submits, app downloads, phone calls, etc.
This question is a part of the Google Analytics Individual Qualification. You can get all the answers with detailed explanation for this exam in our Google Analytics Individual Qualification Exam Answers page.