What do you understand by Idempotence, and how is it used?

Question

Q:

What do you understand by Idempotence, and how is it used?

Answer 1

Idempotence refers to the repeated performing of a task even though the end result remains the same. It is used mostly as a data source or a remote service in a way that when it receives the instruction more than once, it processes the instruction only once.