Password fatigue is when you get tired of having to create and remember different passwords for all of the different websites and apps you use. Imagine that you have a bunch of toys and each one needs a special key to unlock it. You might start to feel tired and frustrated having to keep track of all those keys, especially if they all look the same or have weird rules like needing a certain number of letters, numbers or symbols. It's the same thing with passwords. You might have to come up with passwords that are long, complicated, and have different requirements for each website or app. And then you have to remember them all. It can be too much for your little brain to handle sometimes. That's password fatigue.