Market equilibrium is this situation when market demand is equal of market supply

It was found experimentally that Market has to re-establish Equilibrium via Market mechanism. Such that Market equilibrium is a desired status in the market where both suppliers and Consumers will tend re-establish market equilibrium (through demand & Supply) undeliberately.

Equilibrium and economies scale in market economy

Market equilibrium is when the demand of the product and the supply of the product is equal. If either demand or supply changes, then the equilibrium adjusts.

equilibrium is the responsiveness of quantity demand to a change in price.