Seafloor spreading is a geological process that occurs at mid-ocean ridges, where tectonic plates diverge. As these plates move apart, magma rises from the mantle to fill the gap, solidifying to form new oceanic crust. This process not only contributes to the expansion of oceans but also plays a key role in the recycling of the Earth’s crust. Seafloor spreading is driven by mantle convection, and the rate at which it occurs can inform scientists about tectonic activity and the history of the Earth's geology.