How do you measure whether a billboard brings people into your store?

Why billboards are the hardest channel to credit

A driver sees your board, then searches your name or walks in a week later. Analytics credits the search ad, and the billboard gets nothing. Out-of-home is usually judged on traffic counts and impressions, which say who could have seen it, not whether it moved anyone.

How Quorum measures it

1. Send the placements. The board locations and flight dates from your OOH vendor. There is no tag to install.
2. Measure exposure. Opt-in devices present in each placement’s viewshed during the flight count as exposed.
3. Resolve to households. Exposed devices are matched deterministically to households across ~74.6M opt-in U.S. households.
4. Check outcomes. Those households run through the same measurement as every other channel: visits to your stores across 736,984 tracked venues, and visits to your website through the Quorum pixel, compared with an unexposed baseline.

What this tells a regional brand

• Which boards and markets drove store visits and which only drove impressions.
• Whether billboards moved web traffic, not just footfall.
• How OOH compares with CTV and digital on the same outcome, and how many households saw both.

What it does not tell you

Viewshed presence is an opportunity to see, not proof of a glance. That is why the comparison against unexposed households matters more than the raw count. And because a board has no tag, every OOH study starts with placement data from the vendor, so it is set up with us rather than switched on from a dashboard.

What to ask any vendor before you trust the number

• Is there a control? Raw visits from exposed people are a traffic count, not a result. Ask for exposed versus unexposed.
• What counts as a visit? A drawn store footprint and a radius around an address give very different answers.
• Households or devices? TV is watched by a household and stores are visited by people in it. Device-level matching misses most of the connection.
• Opt-in and aggregate? You should get cohorts back, never person-level records.
• Does the measurer also sell the media? A vendor grading inventory it sold you has a conflict worth pricing in. (Quorum sells no media. We do sell audiences, so when we measure one we sold, it is compared against unexposed households and you can check it with your own attribution.)

Questions

How do you measure billboard or out-of-home attribution?

A billboard cannot be pixeled, so exposure is measured from opt-in devices present in the placement's viewshed during the flight. Quorum resolves those devices to households and checks them for store visits and website visits, compared with an unexposed baseline.

What do I need to measure my billboards with Quorum?

The placement locations and flight dates from your out-of-home vendor. If you also want web results, a Quorum pixel on your website. No tag goes on the board.

Can billboard results be compared with CTV and digital?

Yes. Every channel resolves to the same household graph and is measured on the same outcomes, so OOH, CTV, programmatic and web report the same visit metric.

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