How can you measure engagement quality improvements?

Measuring engagement quality:

Depth metrics:

Click-to-open rate (engagement beyond opening)

Multiple clicks per email

Time spent (if measurable)

Conversion actions

Frequency metrics:

Engagement across multiple sends

Consistent versus sporadic engagement

Re-engagement of previously quiet users

Timing metrics:

How quickly recipients engage

Engagement within first hours versus later

Segment comparison:

How different segments perform

Which segments improving fastest

Identify best and worst performers

Quality improvement means deeper, more consistent engagement, not just more opens.

Not just counting deliveries, but measuring customer satisfaction with those deliveries.