What does amendment 3 of the constitution mean?

The Constitution's Third Amendment, which forbids nonconsensual quartering of soldiers in private homes during peacetime, lies almost forgotten among theBill of Rights. It has been neither the source of much judicial concern nor the object of extensive academic or political controversy. Yet its subject was of great importance to the framers of the Constitution, and it has recently received a modest new lease on life as one of the foundations of the modern constitutional right to privacy.

in a nutshell it means soldiers cant walk into a random citizens home with out consent(permission)