What is the purpose of Verifiable() in Moq?

Question

What is the purpose of Verifiable()?

If I verify a Mock and leave this out it still verifies the SetUp.

Edit:<

Answer 1

When the Verify() method is called at the end of the test, if any of the expectations marked as verifiable have not been called, then an exception is thrown.

VerifyAll() does not check for verifiable expectations.