Getting started on PC or Mac
https://support.zoom.us/hc/en-us/categories/200101697-PC-and-MAC
Getting started on IOS or Android
https://support.zoom.us/hc/en-us/categories/200110013-iOS-and-Android
Zoom Presence
https://support.zoom.us/hc/en-us/categories/200108436-ZoomPresence