Supply of a good refers to the amount of a good a producer is willing and able to sell in a given period of time, at a given price, ceteris paribus.
The main objective of producers is to maximise profits.
The law of supply states that in a given time period, the quantity supplied of a product is *directly related to its price, ceteris paribus.
Change in price, causes shift along the curve Change in non-price factors, causes shift of entire curve.
Whatever the price, the same quantity is supplied (fixed) e.g. supply of rare antiques