Flanging is like putting two copies of the same sound on top of each other and then moving one of them back and forth really quickly. Imagine you have a toy car and you draw a picture of the car on a piece of paper. Now, you draw another picture of the same car on another piece of paper and place them on top of each other. Then, you move the top piece of paper back and forth really quickly while holding the bottom paper still.
In music, when you apply this effect to a sound, it creates a whooshing or sweeping sound that goes up and down. It's like you're moving the sound back and forth to make it seem like it's moving around your head. Flanging is often used in guitar solos, vocals, and drums to add a special effect to the sound.
Flanging makes the sound seem like it's moving and changing, which can make it more interesting and exciting. It's a fun effect to use, especially if you want to make your music stand out and sound unique. That's why many musicians and producers use flanging in their music to add a special touch.