Modulus and argument are really important when we use complex numbers in the real world. This is especially true in areas like engineering and physics.

• Modulus ($|z|$): This tells us how far a point is from the center (or the origin) on a complex number graph. In electrical engineering, the modulus might show us how strong an alternating current is.

• Argument ($\theta$): This represents the angle in a polar graph. It helps us figure out direction. For example, when navigating, the argument can tell us the direction a ship is heading.

Understanding these ideas is key for changing complex forms and solving everyday problems!