What is the advantage of regular reflection over irregular reflection

When light rays bounce off a completely smooth surface, such as a still pool of water, a mirror, or even something like a shop window, we are able to see a very clear reflection on the surface. Every ray of light is reflected perfectly from the surface and bounces back in a regular way. The reflected image is very clear and sharp unlike Irregular reflection.

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 It makes objects visible. 

  Example, wall.

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