By Billboard Media
Out-of-home (OOH) advertising is having a good year, and the data explains why. Here are four figures from industry research, what each one means in practice, and what to do with it.
OOH spend grew 15% in Q1 2026
UK advertising investment rose 9.3% year on year to £11.7bn in the first quarter of 2026. Out-of-home grew faster than the market as a whole, at 15.0%, and digital OOH grew 17.6% (AA/WARC Expenditure Report, July 2026).
What it means: more advertisers are putting money into outdoor, which usually means more competition for the best sites. Good locations are finite, so booking early is the sensible response.
OOH reaches 97% of GB adults every week
Route, the industry’s audience measurement body, puts weekly reach across all OOH formats at 97% of adults in Great Britain (Route 2025, published by Outsmart).
What it means: outdoor is among the widest-reaching media available. But that figure covers the whole sector, not a single board.
What to do: for a local business, the number that matters is reach in your own catchment. Choose sites on the routes your customers already travel, not the biggest site on the map.
Heavy OOH users saw a 129% boost to the effect of search
Peter Field analysed IPA Effectiveness Databank case studies from 2014 to 2024. Among cases with very large business effects, brands that used OOH heavily boosted the effect of search by 129% compared with those that didn’t invest in it (Rapport / Peter Field, published by Outsmart).
What it means: a billboard doesn’t replace search, it feeds it. People who recognise your name are more likely to look you up by name, which is the search that converts best.
What to do: record your branded search volume (searches that include your business name) before your campaign starts, then check it monthly. It’s free in Google Search Console, and it’s the clearest early signal that your billboard is working. Our guide to why marketing gets clicks but no leads explains why.
Social ads get 52% more engagement after an OOH ad
Lumen Research used eye-tracking to measure how people responded to social ads. Engagement rose by 52% among people who had already seen an OOH ad with similar content (Lumen Research for JCDecaux, published by Outsmart).
What it means: your channels work harder when they look and sound alike. A billboard primes people, and the social ad then feels familiar.
What to do: use the same image, line and colours on your billboard and in your social posts and ads. Run them in the same weeks.
How to read these numbers
Treat them as strong directional evidence, not a forecast of your own results. The spend figures come from an independent industry survey, but the other three are published by Outsmart, the OOH industry’s trade body, and most of the underlying studies are based on larger brand campaigns. Your results will depend on your site, your creative and how long you run.
That’s why the most useful number is your own. Set a baseline before launch, then track enquiries, branded search and ‘how did you hear about us?’ answers. Our guide to measuring billboard ROI shows how.
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