Answer :

used to express the view that a minimalist approach to artistic or aesthetic matters is more effective.
When you say, Less is more. In my mind, it practically means less is best. Meaning, its best not to use to much. 
For example: Some one might say, -"You shouldn't wear too much ostentatious jewelry. A simple pearl necklace is more classy. Less is more."
~Thats basically what it means :)

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