Permission culture is like when you want to do something, but you have to ask permission from someone first. Just like how you have to ask permission from your parents to have a cookie before dinner.
In the real world, permission culture applies to things like using someone else's photos or music. You need to ask permission from the person who created it first, just like how you need to ask your parents if you can have a toy that belongs to your sister.
This is important because it's a way of respecting other people's work and ideas. It's kind of like saying "Hey, I know you worked really hard on this and I want to use it, but I want to make sure it's okay with you first."
So, remember to always ask permission before using other people's things or ideas. It's the right thing to do!