A mercat is a place whaur fowk gang for tae coff or sell things. Whan fowk haes products for tae sell, thay stell a mercat place. Whan things are selt, fowk coff the product, an this briskens up the economy. The mercat is a guid wey o haein supply and demaund equal-aqual. This is acause prices chynge tite tae seegnal whit guids are in heich or laich supply or heich or laich demaund.

A fish mercat in Sooth Korea
Wet market in Singapore