how to use image effect shader in unity5?

Hey body. I am confused about how to use image effect shader in unity5. I just noticed that shader was very important. The surface shader is not hard to understand. But i just do not know when and how to use image effect shader. Thanks for your helping.

There’s usually a script that you need to place on your camera. Try that.

Unity - Manual: Image Effects

Unity - Tutorial: Image Effects Overview