Countdown timers in ads are used to show that an offer will end soon, which can push people to act faster. This works because people do not like missing an opportunity, so they decide quicker. But if every ad uses a timer, people may stop trusting it, especially if the timer resets again. It is better to use it only for real offers that truly end at a set time. When used honestly, it can increase clicks and sales. Do countdown timers really improve ad results in the long run?