How do I buy time?

Excuse me, but I'm curious. I've been hearing about the concept of 'buying time' in various contexts, but I'm not quite sure how to go about it in a practical sense. Could you please elaborate on how one might actually buy time? Is it a matter of investing in opportunities that allow for more efficient use of our days, or is there some other strategy involved? I'm eager to learn more about this intriguing concept and how it might apply to my own life and financial goals.