The Washer Method is a technique used in calculus to find the volume of a solid of revolution. This method involves rotating a region around an axis, creating a three-dimensional shape. By subtracting the volume of the inner solid from the volume of the outer solid, the volume of the washer-shaped object can be calculated. To apply the Washer Method, one typically sets up an integral that represents the volume. The formula involves the outer radius and inner radius of the washers, which are functions of the variable of integration. This method is particularly useful for regions bounded by curves, such as y = f(x) and y = g(x).