A chain of barbershops would like to set up a mobile ad campaign to reach an on-the-go audience through their mobile devices. Which ad placement would be outside the focus of their campaign goal?

The goal is to reach an "on-the-go audience through their mobile devices." A mobile website for personal care aligns with this goal because it's accessed on a mobile device and relates to the barbershop's services. A tablet app and a smartphone app also fit the criteria of being on mobile devices and potentially reaching the target audience. A desktop ad, however, is outside the focus because it targets users on a stationary computer, not an "on-the-go" audience using mobile devices.