Splatting is a method of passing multiple parameters to a command as a single unit. This is done by storing the parameters and their values as key-value pairs in a hashtable and splatting it to a cmdlet using the splatting operator
Splatting can make a command more readable and allows you to reuse parameters in mulitple command calls.
Note: The Array expression operator or
@() have very different behavior than the Splatting operator
Read more at about_Splatting @ TechNet