What does it mean to play box to box?

Could you please clarify for me the meaning of the term 'playing box to box' in the context of, say, football or soccer? I'm not entirely sure what it entails, and I'm curious to know how a player who is described as box to box operates on the pitch. Is it a specific role, or a way of playing that certain players adopt? I'd appreciate any insights you could provide on this topic.