Picnic box hole

Fed Reservse rate slashes and the current mortgage rates? - federal reserve mortgage interest rates

Today, bars the Federal Reserve benchmark interest rate from 0.25 to zero. What the hell does that mean? And as it does not matter how many times the Fed lowered rates, which affects only 15 years and 30 years interest rate mortgage? They have something to do with the demand for apartments? Is not that the housing industry in the pool now? How come no records? Can someone explain to me, imagine in the language of a layman?

Thank you.