The Postfix notation is used to represent algebraic expressions. The expressions written in postfix form are evaluated faster compared to infix notation as parenthesis are not required in postfix.

What is the advantage of postfix notation?

Advantages of postfix: You don't need rules of precedence. You don't need rules for right and left associativity. You don't need parentheses to override the above rules.

Why we use postfix prefix expressions than infix form?

Prefix and Postfix expressions can be evaluated faster than an infix expression. This is because we don't need to process any brackets or follow operator precedence rule. In postfix and prefix expressions which ever operator comes before will be evaluated first, irrespective of its priority.