Soil resistivity is like how easily electricity can flow through dirt. Think of dirt like a bunch of tiny paths for the electricity to travel through. If the dirt is really hard and compact, it's harder for the electricity to flow through those tiny paths. This means the soil has a high resistivity.
If the dirt is really loose and crumbly, it's easier for the electricity to flow through the tiny paths. This means the soil has a low resistivity. Scientists and engineers can use soil resistivity to help figure out things like how to build safe electric systems in places with lots of dirt, like farms or construction sites. They use special tools to measure the amount of resistivity in the soil. The lower the resistivity, the better it is for electricity to flow through the soil.