When you upgrade using Upgrade Coordinator, you can select to perform a One Click Upgrade, where everything is upgraded during one upgrade session. Or you can select to Plan Your Upgrade, and customize which components are upgraded, and organize component objects into upgrade groups.
Upgrade Coordinator performs checks and displays relevant warnings and errors before and during the upgrades.
To open the Upgrade Coordinator in the vSphere Web Client, navigate to Networking & Security > Installation and Upgrade > Upgrade.