The last will expresses your desire the handling your financial and personal affairs when you die.
A way to avoid the cost and delay of probate, is to spread out the distribution of your estate over time, protect assets from creditors, and much more.
HEALTH CARE POWER OF ATTORNEY
You can name someone to make decisions about your medical treatment if you are unable to make them yourself. Also includes a living will.
FINANCIAL POWER OF ATTORNEY
You can name someone to manage your financial or business affairs if you are unable to handle them yourself.