What is not considered a “source” in Google Analytics by default?

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 compares metrics based on user acquisition date over a series of weeks?

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

What would prevent data from appearing in a Custom Report?

Too many metrics in a Custom Report A filter that removes all the data Too many dimensions in a Custom Report Custom Report isn’t shared with users in the same view Download Google Analytics Individual Certification Exam Answers (PDF)