Most teams don't need a new metric. They need a place to put the ones they already have.

A product performance report template is exactly that: a standardized layout for tracking how individual SKUs or product lines perform across revenue, margin, conversion, and channel-level metrics over time. Not a dashboard tool, not a BI platform. Just a consistent structure you (or your team) fill in every week or month so the numbers mean the same thing each time you look at them.