Marketing / Social
Engagement Rate ER (by impressions / by reach / by followers)
How actively an audience interacted with content, expressed as a rate.
The fork, why two teams get different numbers
There is no agreed denominator, and each choice tells a different story.
In the Metric Library
- The full fork, both definitions worked all the way through
- The trap that makes the number lie, on a real export
- Every formula variant, spelled out
- The reconciliation anchor, what to tie it to and when to refuse
Reference: social-platform analytics conventions (reference) · IAB (social measurement · reference)