These days, people seamlessly switch between their phones, their computers, and local stores when making purchases and returns. Just think about all the websites and apps that now offer in-store, pickup, and shipping options, letting customers know whether an item is in stock or not. In this omni-channel world, customers expect to see digital ads in retail spaces frequently. — Retargeting ads remind customers of items they’ve viewed in the past. Banner ads and clever graphics call out promotions on retail websites. Digital advertising is already thriving online. But brick-and-mortar operations have a unique opportunity when it comes to digital ads in their retail spaces. By using in-store displays, they…