Want quick promotions? Walmart CEO who started as a warehouse worker shares the key skill for climbing the corporate ladder

Doug McMillon started working at Walmart's warehouses at 17 and climbed the ranks to become the youngest CEO since Sam Walton. He credits his success to volunteering to cover for his boss, doing his job well, and being a great teammate. His approach aligns with similar advice from Pret A Manger CEO Pano Christou.