Safe heaven and high yielding currency

Please can someone explain what a safe-heaven and high yielding currency id. When do you know when a currency is a “safe-haven” or “high yielding” and how can i use that in trading.

This could help you understand what safe-haven currencies are:

I see, you already have your answer! By the way, if you are a new trader, just use the major Forex pairs; don’t go for any exotic trading pairs initially!