Similar to demand, there can also be a shift in the supply curve. This can be caused by many factors, such as: the cost of inputs, productivity levels, technology, taxes, levels of subsidies, expectations, or government regulations.
If one of these factors causes an increase in supply, then we see the supply curve shift to the right. For example, if the cost of making a product suddenly decreases, the producer will be able to offer more of the product at all given price points.
In contrast, when the supply curve shifts to the left, it shows a decrease in supply. For example, if the government creates a new tax that causes the supplier to have to pay more money, they will now supply less at all possible price points.
Remember, a shift in the supply curve is something that happens regardless of price. It is some other factor that causes this shift.