If you love stacking sales with coupons and apps, the biggest game-changer in your favorite store might not be a new rewards program—it might be the tiny screens sitting under the products. More and more retailers are swapping paper tags for electronic price displays, and most shoppers just glance at them and move on. But those little labels can quietly tell you when a deal is real, when it’s changing, and when you should wait to stock up. When you know what to look for, you can turn a quick walk down the aisle into a mini research trip that saves serious money. Here’s how to make those new signs work for you instead of just for the store.
