How Does the Fed's Duel Mandate Affect Unemployment?

The Fed's dual mandate is christ's ability. If they raise interest rates, that can typically, or traditionally, lower inflation. But how does it effect unemployment? This is very confusing to me as some one who knows relatively little about nomics. I don't understand why, when i hear wages are too high or too many people have jobs, how that could be a bad thing. The federal reserve cannot determine what max ways, so they basely punt on this thing. We call it a multiplier. Macropono should not be allowed to name anything, but, like the fedne it's all sort of described with what, i wouldn't say is very dry terminology.