The definition
Geo-grid tracking samples your map-pack position from many points laid out across a geographic area, producing a grid of rankings rather than a single figure.
The output looks like a heat map: strong near your verified location, typically weakening with distance, with local exceptions where a competitor is dominant.
Why a single number lies
Map position is proximity-sensitive, so “we rank #3 in Atlanta” is close to meaningless. You might be #1 within two miles and absent past six.
A city-level average hides exactly the neighbourhoods worth acting on, which are usually the ones where you are invisible rather than the ones where you already win.
How we use it
It is one of the inputs to Search Visibility Share, reported city by city rather than blended. It also makes the proximity constraint legible: if the grid shows a clean distance falloff and nothing else, the honest conclusion may be that no marketing work closes that gap.
Check it yourself
Even without a tool, you can approximate this: run the same query from four or five points spread across your market, signed out, with location set explicitly each time.
The pattern that emerges, where you hold and where you vanish, is the same information a grid gives you, at lower resolution.
See where you actually stand
A free Visibility Check runs twelve real buying questions for your category across three surfaces.
Get my free Visibility Check