The answer to 'types of aeration' is that there are two main types of lawn aeration: core aeration and spike aeration. Core aeration involves using a machine to remove small plugs of soil from the lawn, allowing air, water, and nutrients to better penetrate the soil. Spike aeration uses solid tines or spikes to punch holes in the soil without removing any plugs. Both methods help reduce soil compaction and improve the health of your lawn.
Core aeration is generally considered the more effective method, as it physically removes thatch and soil plugs to create openings in the lawn. Spike aeration can be done with a simple garden tool, but it doesn't remove any soil and may actually compact the soil in some cases.