What?

Aeration is the process of producing small, long holes into the ground in order to provide the soil with good air circulation and improve the grassroots’ water and nutrient consumption. Air circulation is very important as it lets stale carbon dioxide out, in turn, making room for fresh new oxygen to go in. Lawn aeration also helps break through piled-up thatch in high maintenance lawns and reduces lawn compaction, which is the main cause of moss.

Why?