The document discusses volume, specifically defining it as the space a figure occupies and noting it is measured in cubic units. It provides the formulas for finding the volume of different shapes like prisms, which is done by multiplying the area of the base by the height. As an example, it calculates the volume of a rectangular prism that is 8 feet tall with a base of 6 feet by 3 feet to be 144 cubic feet using the volume formula for a prism.