Hi @Tevon2.0 ,
Accessing PowerShell for SharePoint Server:
After you install SharePoint Server, applicable PowerShell cmdlets are available in the SharePoint 2016 Management Shell. You can manage most aspects of SharePoint Server in the SharePoint Management Shell. You can create new site collections, web applications, user accounts, service applications, proxies, and more. Commands that you type in the SharePoint Management Shell return SharePoint objects that are based on the Microsoft .NET Framework. You can apply these objects as input to subsequent commands or store the objects in local variables for later use.
With the SharePoint Management Shell, you do not have to register the snap-in that contains the cmdlets. Registration of the Microsoft.SharePoint.PowerShell.dll module for SharePoint Server cmdlets is automatic, as a result of the Add-PSSnapin Microsoft.SharePoint.PowerShell line in the SharePoint.ps1 file that is located in %CommonProgramFiles%\Microsoft Shared\Web Server Extensions<version>\Config\PowerShell\Registration, where version "15" equals SharePoint Server 2013, and version "16" equals SharePoint Server 2016. To use the PowerShell console, you must register this snap-in manually.
I have found this official article to introduce SharePoint PowerShell, it includes Server and Online.
SharePoint PowerShell
You could select the PowerShell what you need from the options on the left box.
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