What is engagement rate in GA4?
How is engagement rate calculated?
Count the sessions that were engaged. Divide by all sessions. Google's Analytics Help gives the rule and the three tests for "engaged"1. A session is a period of user activity.
A key event is an event you mark as especially important to your business. In GA4, use "key event" for this, not "conversion".
What does it not tell you?
It does not tell you whether anyone bought. A visitor can read a page for eleven seconds, view two pages and leave. That visit counts as engaged. It still made no money.
Two warnings follow. First, the three tests are loose, and any one of them is enough. Second, the rate says nothing about margin, returns or repeat orders.
Do not confuse it with engagement rate on social media. That is a different metric with a different definition. Always say which one a report means.
How does it relate to bounce rate?
In GA4, bounce rate is the percentage of sessions that were not engaged, and Google calls it the opposite of engagement rate1. It is not the same metric as bounce rate in the older Universal Analytics. Read the two as one measure seen from both ends.
Why does it matter for a brand?
Because it can turn up in a report without a definition. A rising rate can look like better traffic. It may reflect a change to the site instead. Ask what changed, and whether sales moved with it.
It is one of the checks in an ecommerce tracking audit. For the definitions behind GA4's metrics, read what GA4 counts and what it doesn't. What GA4 can count at all also depends on consent: see Consent Mode.
Worked example
Easily confused with
Engagement rate vs Bounce rate
The opposite number in GA4: sessions that were not engaged.
Engagement rate vs Conversion rate
Orders or goals divided by visits, not engaged visits.
Engagement rate vs Social media engagement
Likes, comments and shares. A different idea.
FAQ
What is a good engagement rate in GA4?
There is no number that is right for every site. Compare your own rate over time, and against sales.
Is "engaged sessions rate" the same as engagement rate?
Yes. Google defines engagement rate as the percentage of engaged sessions1; "engaged sessions rate" is just a longer name for it.
Does a high engagement rate mean more sales?
Not by itself. It counts engaged visits, not orders or margin.
Sources
- [GA4] Engagement rate and bounce rate - Analytics HelpPrimary source
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