The iOS 10 Lock Screen gives you access to the camera and to a new Widgets screen. On this widgets screen you can place various widgets from apps installed on your device, such as the Calendar, Mail, Music, Siri, and so on. You can edit the widgets on the screen and reorder them. Many third-party apps include widgets as well, and some have more than one widget you can add.
As always, a nice job of explaining. I thought I knew how to do this. After Gary's video, I realized all I didn't know. Thanks as usual.