Demand-supply equilibrium
If the demand for a product at a given price exactly equals the supply of the product at the price, demand and supply are said to be at equilibrium. In the figure 1 below, the point on the graph where the supply and demand intersects is the point of equilibrium. This means that supply and demand are perfectly balanced.
Equilibrium can only be archived at a point in time. The moment there is a change in either demand or supply, an imbalance will occur and the equilibrium will be disturbed. But a new equilibrium will be reached eventually.