On Windows, a printer pool is a single named printer with two or more print devices (printer ports). Windows sends a given print job to any of the printers in the pool. This feature is very useful in environments where users do a lot of printing and need the speed that additional printers can provide, without having to ask the user to choose which specific print device to use.
There are no PowerShell cmdlets to enable you to create a printer pool. Older printer features—the use of PrintUI.DLL and RunDLL32, which have been features in Windows for several versions. These tools are another example of making use of console applications where you need them.