TikTok Hook Retention & Completion Rate Auditor.

## The Anatomy of a Viral Short

On TikTok, YouTube Shorts, and Instagram Reels, subscriber count means very little. The algorithm evaluates every video in a test pool strictly based on two metrics: **Hook Rate** and **Completion Rate**.

### FAQ

**Q: What is the Hook Rate?**
A: The percentage of viewers who did not instantly scroll away within the first 3 seconds. For a video to go massively viral, you typically need a Hook Rate exceeding 50%.

**Q: What is Hold Rate?**
A: Hold rate represents the audience that made it past the 3-second hook, who *also* finished the video. It indicates that while your hook was excellent, your actual content narrative kept them engaged until the end.