What it isYou buy physical ad spots, such as billboards, transit ads, elevator and in-store screens, and posters.
How it's boughtYou book directly with the operator or through an OOH network, by site and period.
When it's the right buyBought by location, not audience. The question is who walks past, not who follows. Elevator and in-store screens dominate several Asian markets the open web never indexes.
Lead timeWeeks, for printing and installation
The text above describes the whole Out-of-Home family. The numbers below are just for this type, from publishers who've published them.