Electric motors are essentially conversion devices. They convert one form of energy — electrical energy — into another form — mechanical energy. In the process, they consume power and they do work.
It is easy to be imprecise about these terms, as well as the units of measurement we use in connection with these terms, such as horsepower (HP), watts (W), and amps (A). Obviously, it’s beneficial to have a precise understanding of the relationship between these units of measurement, especially since they can help you make sense of the related issues of efficiency and power system sizing.