In Google Analytics 4, bounce rate is the percentage of sessions that are not engaged sessions.
A practical example
If 70 of 100 sessions meet your configured engagement criteria, the bounce rate is 30%.
What to watch for
GA4 engagement includes duration, a key event or multiple page or screen views. Its bounce rate differs from Universal Analytics and is not a direct ranking score.
Related reading
Explore Google Analytics (GA) and Landing Page. Try our UTM link builder for a practical next step. See how this fits into Web development.