The biggest screen in town

A small online shop in Dubai sells bedding for children's rooms, the soft, carefully made kind that a particular sort of parent hunts for. Every so often the owner is offered a slot on the giant screen above one of the busiest junctions on Sheikh Zayed Road, or a spot in the break of the most watched match of the season. It feels like arriving.

The arithmetic says otherwise. Space in front of a huge crowd is priced for the crowd, and because so many businesses want to be there, it often costs more per person than finding the few people who actually care. She would be paying extra to reach drivers who have no children, no interest in bedding and no reason to remember her name by the next exit.

A handful of businesses can make the giant crowd work. They sell something nearly everyone buys, often, without much thought. For most of us, a crowd is a middle, and the person in the middle is not about to try a new shop, tell a friend or change a habit. The people who move first are always at the edges: the parent who has been searching for weeks, the one who already follows three shops like hers.

The pull of the big slot is the same pull that sends sellers to the busiest exhibition hall and the loudest feed. It is not that it works. It is that everyone else seems to be there.

That is the real cost. Watching where the crowd is takes attention away from the only question that matters to a small shop: who exactly is this for, and what would make them act?

A crowd hears noise. A message is meant for someone.