Measuring "Engaged visits" and "Engagement rate" will be overall more useful than what we currently measure in "Bounce rate".
This will be more important as it's also the default in GA4, and overall for sure it does make sense.
There is no concept of bounce rate in GA4 reports. This metric has been replaced by Engagement Rate. It is calculated as:
Engagement Rate = engaged sessions / sessions
An Engaged session is a GA session in which a user has actively interacted with your website/app for at least 10 seconds.
The GA session in which a conversion event is fired or two or more pageviews/screenviews are fired is also reported as an engaged session.
Since Engagement rate does not rely only on pageviews it can be easily used across platforms (website and mobile app) for measuring users engagement.
This is not the case with the bounce rate metric which usually fails to measure user engagement on mobile apps and other single-page apps.
Bounce rate also does not work well in certain niches like publishing (news, blogs) where single-page sessions are common.
There are 3 session related metrics in Google Analytics 4 properties: