Clicking this button delegates some of your responsibilities as monarch to your assistant (also known as the computer).
Using the assistant is an excellent way to learn. The right way to use it is to click the button so the computer sets the orders, which gives you an idea of some sensible orders. Then go in and adjust the orders to achieve your particular short term goals (such as the tutorial episode goals).
If you leave the computer assistant in control, your adjusted orders will be carried out for one turn only, then next turn, the computer assistant will make all new orders.
So turn the automated assistant off if you want your changes to be used for more than one turn.