The My People feature, new for Windows 10 Fall Creators Update, is designed to streamline communication with the handful of people with whom you communicate most often. You'll know you have My People when its new icon consisting of two head outlines shows up in the Taskbar's notification area after you update to the new version.
The idea behind My People is to let you more easily email, chat with (via both text and video), or send files or media to your closest contacts, friends, and loved ones. It also introduces a cute instant emoji notification for those closest contacts. Appealingly, My People is designed to save you from having to open up separate apps in order to do all those things.
At this early stage, only email, Skype, and the emoji sending capabilities are enabled, but any UWP app will be able to take advantage of it. I have no doubt that Facebook Messenger and other messaging apps will be available to connect with My People in short order.
I tested the new feature on a Microsoft Surface Book with a Core i5 CPU, 8GB RAM running 64-bit Windows 10 Fall Creators Update.
Source : https://www.pcmag.com/feature/356757/windows-10-fall-creators-update-how-to-use-my-people