What shifter in a supply curve?

A shift in a supply curve occurs when there is a change in the quantity supplied at every price level, typically due to factors other than the price of the good itself. These factors can include changes in production costs, technology advancements, number of suppliers, government policies, or external events. For example, a decrease in production costs may shift the supply curve to the right, indicating an increase in supply, while an increase in costs could shift it to the left, indicating a decrease in supply.