ConvertFrom-Csv Cmdlet in PowerShell

Module: Microsoft.PowerShell.Utility

Converts object properties in comma-separated value (CSV) format into CSV versions of the original objects.

ConvertFrom-Csv
                [[-Delimiter] <Char>]
                [-InputObject] <PSObject[]>
                [-Header <String[]>]
                [<CommonParameters>]

The ConvertFrom-Csv cmdlet creates objects from CSV variable-length strings that are generated by the ConvertTo-Csv cmdlet.

ConvertFrom-Csv (Microsoft.PowerShell.Utility) - PowerShell | Microsoft Docs