Productivity is the most important thing anyone should grow.
Productivity is simple.
Your ability to convert inputs to outputs.
Inputs are whatever you have (time/money/resources/etc)
Outputs are whatever you want (money/sales/profit/value/happiness/societal benefit/etc).
Your productivity is your ability to convert one to the other.
It is the most important thing anyone can grow.
Everyone has limited time.
The world has limited resources.
No one has unlimited money.
Inputs are limited. Outputs are limitless.