Google Analytics cannot collect data from which systems 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 data is Google Analytics Goals unable to track?

Making a purchase Watching a video Customer’s lifetime value Signing up for a newsletter Download Google Analytics Individual Certification Exam Answers (PDF)

What feature would be used to collect how many times users downloaded a product catalog?

Calculated Metrics Custom Report Event Tracking Custom Dimension Download Google Analytics Individual Certification Exam Answers (PDF)