An advantage of MAPE as a measure of forecast error is that:

An advantage of MAPE as a measure of forecast error is that:

each error is taken as a percent of the previous period forecast so you can gauge how the errors are changing over time

each error is squared before identifying percentage differences so it highlights high periods of error

each error is "pluralized" by multiplying by a predetermined constant to increase focus on high errors

each absolute error is taken as a percent of actual demand which provides results relative to actual demand numbers