Web team has deployed the instrumentation to measure bounce rate of anonymous user on mobile web talk page (T294738).

Instrumentation note
The related events will be stored in event.mobilewebuiactionstracking schema. Sample rate is 1% on English Wikipedia, and 10% everywhere else.

QA summary
PASSED CHECKS:
✅ Check init event
✅ Check events of clicking on article or talk page tab
✅ Check events of clicking "Add new discussion"
✅ Check events of clicking a section heading
✅ Check events of clicking read as wiki page
✅ We can join init event with click event by event.token
QA notebook