Which customer analytics metric is considered the MOST valuable by major streaming services like Netflix when determining a show's success?

The film and television industry has transformed dramatically with the rise of streaming platforms. Studios now rely heavily on sophisticated customer analytics to determine which shows get renewed, how content is marketed, and what projects get greenlit. This trivia question explores how major streaming services track customer engagement to measure a show's success beyond traditional viewership numbers.

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Completion rate (percentage of viewers who finish a series)
Initial 24-hour viewership numbers
Social media mentions and sentiment analysis
Number of new subscriptions attributed to the content