The M4 (Makridakis 4) is the latest edition of the premier academic forecasting competition in the world, which recently came to a close, featuring a total of 248 individuals and teams from 48 countries across the globe. The revolutionary M-Competitions, which Professor Spyros Makridakis (whom the M-Competitions are also named after) launched four decades ago, have substantially contributed to improving forecasting accuracy and informing practitioners on the most appropriate forecasting method to use for their specific needs.