A geographic location where cloud providers have data centers. Like different cities where a company has branch offices - you choose the one closest to your customers.
AWS has regions like US East (Virginia), Europe (Ireland), and Asia Pacific (Tokyo), allowing you to host your app near your users for faster performance.
All major cloud providers use the term 'Region' to denote a specific geographic area where they have data centers. This allows users to choose a location that is geographically closest to their end-users for optimal performance.