Black Friday is not “a sale.” It’s the one day of the year where retailers drop prices so low you’d think they’re trying to apologize for the last 11 months. But here’s the problem: Most shoppers have no idea which platform actually offers the best prices. So they waste time. They panic-click. They buy the wrong thing from the wrong store at the wrong moment. Not you. Not this year. Here’s the hard truth, platform by platform, so you know exactly where to buy — and where not to.