Background

The WE2.1 KR states: Ensure a quality reading experience for all users by adapting the default experience for 15% of pageviews, based on the individual needs and constraints of the user. We would like to establish a baseline for this metric by looking at at the frequency of how the interface currently adapts

Acceptance criteria

• Build out instrumentation for the following metrics, as per the spec in https://docs.google.com/spreadsheets/d/1MrnLq5ZefmGl2YEko5SznpHrUaye2mXutr8MN7lisbo/edit#gid=0
• pin status
• media viewer status