A bounce is a session with no meaningful interaction after the first page. Bounce rate is the share of sessions that bounce.
Why It Matters
Every tool defines “meaningful interaction” slightly differently. Some count only page views, some count any event. Always check the definition before comparing bounce rates across tools.
In d8a.tech
Each session carries an is_bounced flag, so you can see exactly which sessions count as bounces and recalculate the rate your own way.