Jamar Williams started PromoDrone in 2016. The company, which makes drones that display banner advertisements, was accepted into new startup incubator, Connect All at the Jacobs Center. Photo by Elise Reuter.

Jamar Williams started PromoDrone in 2016. The company, which makes drones that display banner advertisements, was accepted into new startup incubator, Connect All at the Jacobs Center. Photo by Elise Reuter.

As an advertiser, it can be hard to get people’s attention...