Silent feet is a simple practice that can help the first-day climbers as well as the advanced and world class climber. A simple exercise you can incorporate in your climbing and focus on in your warmups, it helps develop a better sense of precision with your footwork, and mitigate wasting energy through the constant readgustment of the feet.
The idea of silent feet is to make your foot placements as precise and silent as you can. This means, soft, well thought out foot placement. You know you are properly following this exercise when not only can you not hear the placement of your feet, but when you no longer have to readjust them in any way. When first starting out with silent feet, try incorporating it into your warmup:
Goal: Place feet quietly and precisely to not need to readjust them and not be able to hear them.
Duration: On Every route of your warmup.
Practicing it in your climbs warmup is an easy way to practice silent feet. Once you feel good with doing it in your warmups (maybe it even feels automatic or natural) you can try using it in your climbing. Again, it is the same idea of silent, precise foot placements, just on harder and more on-level climbs.
Goal: Place feet quietly and precisely to not need to readjust them and not be able to hear them.
Duration: On Every route of your warmup.
After incorporating silent feet into your warmup and every-day climbing, you may be wondering, what is this doing for my climbing? At first, silent feet helps you place your feet more proactively. This conserves energy and improves your stability on the wall. Then, as your practice more and more the goal is for you to start less proactively placing your feet in the "silent feet way" (precise, silently) and doing it more naturally, just like how you naturally flag or naturally grab a hold a certain way.
While this exercise may not seem important as a beginner, or pointless ("because you're too good for it") as a intermediate or advanced climber, it can help you conserve energy that their is no reason to waste through constant adjustments and make your climbing flow better.