Final answer:
Driving the rod deeper into the soil improves grounding, as this allows for better electrical conductivity and more reliable dissipation of electrical charge into the earth, enhancing safety during electrical events such as lightning strikes.
Step-by-step explanation:
The aspect that can be improved by driving the rod deeper into the soil is grounding. Grounding is the process of connecting a conductor to the earth with a good conductor, thereby fixing it at zero volts. When a rod used for grounding is driven deeper into the soil, it can reach damper earth, which has better conductivity due to higher moisture content. This improved conductivity enhances the grounding effectiveness, making the ground connection more reliable and allowing for better dissipation of electrical charge into the earth.