OOH has the second-lowest average CPM after online ads, according to Solomon Partners (Billboard Insider)

“...out of home media is the best bank for the buck…it is inexpensive,” said Solomon Partners' Mark Boidman at the 2023 OAAA/Geopath OOH Media Conference. Out of home has a cost per thousand (“CPM”) which is less than all the other forms of media except digital display. […]