High Level Flow Diagram

Let's take PowerShell package as an example. Here is the flow diagram when you type "Find-Package PowerShell".

The flow diagram when you type "Install-Package PowerShell".

Where Packages installed to?

Package Type	Install Location
msi	Default path, i.e., a particular .msi package decides. Whether admin privilege is required depends on a particular package.
exe	Default path, i.e., a particular .exe package decides. Whether admin privilege is required depends on a particular package.
PowerShell modules	Well-known PowerShell module install location
nupkg	Default location: $env:programfiles\NuGet\Packages\ $env:userprofile\NuGet\Packages\ User can also specify the destination path in the json file if they want to install packages to different folder.
Zip	zip packages are installed under Destination\PackageName\PackageVersion. "Destination" is defined in json file. It's required.