What does Apple Watch mean by mirroring my iphone?

Watch and iphone are exactly the same application. The mirroring function means that the applications on iphone and applewatch can be displayed synchronously, just like a mirror, that is, the contents displayed by the two devices are exactly the same. This function is designed by Apple for applewatch, which aims to let users use the functions of iphone on their wrists. Through the mirroring function, users can view and operate the applications on the iphone on the applewatch, such as viewing messages, emails, weather, calendars and other information, or using various fitness and health applications.