Why Do We Need Dreams If They Make No Sense?

When you sleep, your brain does not just turn off like a TV. It starts cleaning up the room! During the day, you see and do many things. Your brain saves some of these as memories. But it also picks up dust, like tiny bits of useless info.

Think of your brain like a busy library. At night, when everyone is asleep, librarians come to put books back on the shelves. Some books go into big storage (long-term memory), and some old or broken books get thrown away. This helps you remember what is important tomorrow.

Sometimes your brain throws a tantrum while cleaning. It might mix up a teacher with a dragon because both have scales! This is why dreams feel so weird. But even if they look silly, the cleaning job is very hard work. Without it, you would feel tired and forgetful in the morning.