How to measure an offline advertising campaign

'Half my advertising is wasted; I just don't know which half' is a century old and still quoted because most physical advertising is still run without measurement. It doesn't have to be. Every method below is cheap, and most are free. The rule is simple: design the measurement into the creative before anything is printed, because you can't add it afterwards.

1. QR codes that resolve to short links

Print a QR code on every surface, and make each code point to a short link you control — one per placement if you want to compare surfaces, one per store if you want to compare locations. The short link counts every scan before redirecting to your menu, booking page or offer. That means you count the scan even when the person doesn't convert, which is the honest number: it tells you the surface was seen and acted on.

2. Unique landing pages

Send the code to a page that exists only for the campaign, with the same offer and the same look as the poster. Now every visit to that page is attributable, and you can see how many scanners went on to call, book or order. A page that matches the creative converts far better than a generic homepage — it's why Sav pairs campaign landing pages with store campaigns.

3. Promo codes and redemptions

A code on the counter card or bag insert ('SAV10', or better, a code unique to the store) is redeemed at *your* till, which closes the loop from ad to sale without any technology. Count redemptions per code and you have the most defensible number in the report. Where the offer has a known value, redemptions can be turned into trackable revenue against spend — labelled clearly as what it does and doesn't capture.

4. Proof of placement

Before you measure response, confirm the ad was actually up. Proof of placement is a dated photo of every surface, in every store, on installation day — and again if creative is swapped. It sounds basic; it's the step most store advertising skips, and it's the first thing in every Sav report.

5. Estimated impressions

Impressions for physical media are always an estimate, so treat them that way. A reasonable method: the store's transaction count or door count for the flight, multiplied by the share of visitors likely to see a given surface (a window is seen by nearly everyone; a specific cooler door by fewer). Use the estimate for comparison between stores and surfaces, not as a headline. Never present it with more precision than the inputs deserve.

6. Ask, and compare

The oldest method still works: 'How did you hear about us?' at the counter or in the booking form, with 'saw it at the store' as an option. And compare periods — bookings during the flight against the four weeks before it, controlling for anything else you changed. Neither is precise on its own; together with scans and codes they build a picture you can act on.

What the numbers can't tell you

Scans undercount: many people see a poster and search your name later, or simply walk in. Redemptions undercount for the same reason. Impressions overcount by definition. So read the report for *relative* signal — which store, which surface, which offer outperformed — and use it to concentrate the next flight where the response came from. That's the real value of measurement: not proving the last campaign, but making the next one better.