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Glossary

Engagement rate

In GA4, the share of sessions that were engaged.

Engagement rate = engaged sessions ÷ sessions. GA4 counts a session as engaged if it lasted longer than 10 seconds, had a key event, or had at least 2 page or screen views (Google). The 10 second threshold can be changed per web data stream.

Engagement rate and bounce rate always add up to 100 percent in GA4. On social media, "engagement rate" means something unrelated: interactions divided by reach or followers.

Related terms

Bounce rate in GA4: what it means now, and when to worryGA4 defines bounce rate as the share of sessions that were not engaged. The rule, the formula, how it differs from the old one, and when a high rate matters.Metrics explained · 4 min readAverage session duration and time on page: how each tool measures itWhy GA4, Universal Analytics and privacy tools report different session durations and time on page, the exact method each one uses, and which number to trust.Metrics explained · 5 min read

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