There is no such thing as your ranking for a local search. There is only your ranking at a location, and it changes block by block.
Ask a local business owner where they rank and you will get a number. Third, usually. Somebody told them third, and it went into a report, and now it is a fact about the business the way the phone number is a fact about the business.
It is not a fact about the business. Local search results are computed for a place. Proximity is one of the inputs, so the same query, typed by two people four miles apart, produces two different sets of three businesses on the map. The number in your report was measured at one point — typically the city centroid, or your own address, because that is the cheap way to do it. It is true at that point and says nothing about anywhere else.
That sentence is the whole problem in one line, and it is not a hypothetical. Service businesses tend to be strongest exactly where they are least useful: dense around their own address, where they already have the reviews, the citations, the neighbors who know them. Drive fifteen minutes toward the neighborhood with the larger homes, the commercial buildings, the higher-value work — and the map goes quiet. The single number never showed you that, because the single number was measured back at the shop.
The fix is not complicated, just tedious enough that most tools skip it: measure the same searches from a grid of points spread across the service area instead of from one point. Same keywords, many origins, run continuously.
What comes back is a surface rather than a scalar. And a surface answers questions a number cannot even express:
Rankings measured this way stop being a scoreboard and start being a decision tool. You are no longer asking whether the number went up. You are asking which part of the map moved, in which direction, and whether it was the part worth money.
A grid is a lot more data than one number, and raw grids are genuinely hard to read — a wall of colored dots is not insight, it is homework. That work has to be done for you, by software that names the zone, names the competitor holding it, and names the gap. If a grid arrives as a picture with no conclusion attached, it has just moved the analysis onto your desk.
Pull up your last SEO report and find the ranking figure. Then answer two questions about it: from what location was it measured, and how many locations were there?
If it was one location, you have a reading from a single weather station being used to describe a region. It is not wrong. It is just far too small a sample of geography to support the decisions being made from it — and the neighborhoods it is silent about are, more often than not, the ones you were hoping to grow into.