Mainstream is like when everyone at school decides to wear the same kind of shoes because they are very popular. When something is mainstream, it means a lot of people like it or do it, just like how everyone wants to wear those cool shoes. It’s what most people think is normal or cool.
Think of mainstream like a big river where most of the little fish swim together. The river is wide and easy to follow, so many fish join in. When something is mainstream, it’s like those fish swimming in the big river, following the same path as everyone else because it feels safe and comfortable.
Imagine a big party where everyone is dancing to the same song. That song is mainstream because everyone knows it and enjoys dancing to it. It’s like when a song becomes very famous, and you hear it everywhere, like on the radio or at your friend’s house. Mainstream is about what most people are doing or liking at the same time.