Paid rank tracker vs GSC average position. They lie differently.

Paid rank tracker vs GSC average position. They lie differently.
Client screams 'we dropped to #8!' Rank tracker says so. GSC says avg position 4.2. Who's right? Both. Neither.
— Rank tracker: one location, one device, one moment. Clean for spotting a real algo move on a single term.
— GSC avg position: blended across every query, geo, and device that page ranks for. Truer picture of actual visibility, useless for one keyword.
My rule: track 10-20 money terms in a tracker for sharp daily signal. Judge OVERALL page health off GSC clicks + impressions, never avg position alone.
Stop reporting avg position as a KPI. It's an average of averages. Use clicks.