Why Aeration is Important
Throughout the lifespan of turf, the soil will get compacted, causing roots to not be able to properly grow and also prohibiting the transfer of nutrients like nitrogen, oxygen, and water through the soil where the roots can reach them. The denser the soil, the less nutrients your grass receives, the thinner it becomes.
Aerating is the process of loosening the soil either by solid metal tines or removing core samples. These new holes in the turf cause the soil to settle loosely, allowing those important nutrients to reach those roots and bolster grass growth.