Lawn Care and Landscaping feels it is important to aerate your grass because it improves soil drainage. Lawn aeration consists largely of controlling lawn thatch and reducing soil compaction.
Lawn thatch is the layer of dead organic tissues that deprive the lawn from its much-needed oxygen, water and nutrients. Over time soil compaction makes it difficult for grass to root. It disturbs natural rainwater irrigation. Therefore, it is important to aerate the lawn. This is especially true for lawns with high traffic. If people walk or even run over your lawn, the pressure generates compaction in the soil.