Returns a string that is the result of concatenating two or more string values.
string CONCAT(params string[] values)
CONCAT(Value1, Value2)
or
CONCAT("Telephone", "-", "0044 1424 863 450")
Will return "Telephone - 0044 1424 863 450".
or
Customer full name from the Customer Database, using CustFirstname = John and CustSurname = Smith
CONCAT("CustFirstname", " ", "CustSurname")
Will return "John Smith".