In this tutorial you have learned how to prioritize your strike to gain maximum effect of weapons on an array of targets. You will rarely, in the game or in real life, have enough munitions or resources for all of the objectives you need to achieve. Therefore, it is important to make choices about which targets get your best munitions, when and by which method.
Another factor to consider is the reaction of the enemy. In this scenario the enemy's options are quite limited; he can scramble his unarmed aircraft and you need to shoot them out of the sky instead of killing them on the ground. Most scenarios will have a much more robust and active enemy. He always gets a vote and will try and mess up your nicely laid plans.
Enjoy playing around, see you in Tutorial 4, where the enemy might try and fight back.