One check tells you nothing. The point is the line.

Say you measure your business today and you get 63 out of 100. What does that tell you?

Almost nothing. Not because the measurement is wrong, but because one point has no direction.

A number that moves is not a number. It is a range.

We have watched a real listing swing 20 points inside a single day. So a 63 could be a good afternoon in a bad month, or a bad afternoon in a good one. Same number on the screen. Opposite conclusions. Opposite decisions about where to spend your time.

There is no way to tell those two apart from the number alone. The only thing that separates them is having measured before.

Three lines worth more than the score

A single score is a summary, and summaries hide the interesting part. What you actually want to watch:

• Where you typically sit: your position across all the points around your address, not your best one.
• How many of those points put you in the top three. This is the one that maps to the phone ringing.
• Who is above you, and whether it is the same names as last month.

The score is useful because it is one number you can hold in your head. The three lines above are what you act on.

You cannot measure the past

Here is the part that catches people out.

You can measure your business today, for free, as often as you like, on this site, or by hand with a bit of patience and a map. Nobody can stop you, and nobody should charge you much for it.

What you cannot do, at any price, is measure last Tuesday. History is the one thing that has to be collected while it is happening. If nobody was measuring you in August, August is gone, and so is the ability to say whether the quiet month was a slide or a normal dip.

That is the real reason to track something rather than check it. Not diligence. Arithmetic.

How often is often enough

Weekly, for a local listing. Daily mostly measures noise: the pack shuffles, someone posts a photo, it settles. Monthly is too slow to connect a drop to what caused it: by the time you see it, four things have changed and you cannot tell which one mattered.

Weekly is close enough to catch a real move while you can still remember what happened that week.

What a line lets you do that a number cannot

• Tell a bad afternoon from a real slide, and only worry about the second one.
• Know whether the thing you fixed actually worked, instead of hoping.
• Point at the week it started, which is usually the week you find the cause.
• Walk into a conversation with a competitor, a landlord or a buyer holding evidence instead of an impression.

None of that is available from a screenshot taken today.