why is my mic not working?

https://preview.redd.it/uexqkdz50f8e1.jpg?width=1920&format=pjpg&auto=webp&s=83e9db4632157d1ea256fa219de889aea49b0b7e

in this picture im talking but my miic is not registering as shown its not lighting up when talking, what do i need to do?