When ordering online, confirm, confirm, confirm
The other day, I watched as a customer walked into a restaurant asking for his order. The restaurant hadn't received the order, however, and the man became upset. He admitted that he's not great with technology, and he complained that this always seems to happen with the restaurant's third-party ordering system. When it does happen, he gets no confirmation email and his card is not charged.
The next day, someone in an online class expressed confusion about how to meet their coach for a scheduled appointment, but the coach had no appointment on their calendar. Similarly, years earlier, a relative told me they had ordered an Uber, but it never showed up.
In all of these cases, I'm almost certain the users did not click the final button labeled Order, Confirm, Submit, or similar. (The restaurant owner blamed browser cookies, but that has nothing to do with it.)
I can hardly blame these users, though. I once showed up to a hotel, thinking I had booked a room with them, only to find that they had no reservation under my name. I looked for the confirmation email, and sure enough, it didn't exist! I needed to quickly book with some rinky-dink place across the street. I had made the same mistake!
This isn't about tech literacy or intelligence; it's about bad user interface design. A depressing amount of software ignores the basic rules of usable design. In this case, what looks like a confirmation screen (i.e., “your order has been placed”) may actually be a confirm screen (i.e., “tell us that you're sure”). When users are on those screens, their loci of attention may be on the order details rather than the user interface. They want to know that the flight time is correct. They want to know that the price is correct. They may not be paying attention to the Confirm button, which is probably offscreen anyway. They may not be looking at the tiny text at the top which reads, “Please review this information before booking your flight.” They are focused on something else, which may explain why they miss context clues in the periphery. Jef Raskin discusses this at length in his book, The Humane Interface.
So before leaving an app, website, or other ordering system, be sure to confirm, confirm, and confirm again. Slow down. Read carefully. Scroll. Zoom in and out. Make sure there's nothing else you need to do. A few seconds of prudence may prevent lots of frustration later.