How to count your store traffic without buying sensors
Your sales tell you what happened at the register. Your traffic tells you what happened at the door. Here is how to count it without new hardware.
Two lists of products always drift apart. Here is how to run the counter and the website from one catalog without overselling.

Many shops start selling online with a second list of products: the website has its own catalog, its own prices and its own stock count. It works for a while. Then a customer buys online the last unit that just sold at the counter, and someone has to call and apologize.
Pick one place where products, prices and stock are decided, and let everything else follow it. For a store with a register, that place is usually the system behind the register, because that is where most stock moves.
When the counter and the website share one stock, a sale anywhere updates the count everywhere. That is the whole point: less typing, fewer apologies, and one set of numbers to trust.

Your sales tell you what happened at the register. Your traffic tells you what happened at the door. Here is how to count it without new hardware.

Conversion is the share of visitors who buy. It is the clearest way to see whether the floor, the stock and the line are working.

Ten minutes with the right numbers beats an hour with every report. These are the five we would read first.