Which user characteristic may NOT be used to change keyword bids in AdWords?

What report shows the percentage of traffic that previously visited a website?

All traffic > Referrals report Behavior > New vs returning report Behavior > Frequency and Recency report Interests > Affinity categories report Download Google Analytics Individual Certification Exam Answers (PDF)

What report shows users who initiated sessions over 1-day, 7-day, 14-day, and 30-day periods?

Active Users report Cohort Analysis report Users Flow report User Explorer report Download Google Analytics Individual Certification Exam Answers (PDF)

Custom Dimensions can be used as what?

Secondary dimensions in Custom Reports Primary dimensions in Custom Reports Secondary dimensions in Standard reports All of the above Download Google Analytics Individual Certification Exam Answers (PDF)