Aerating your lawn helps improve the overall health of your grass by allowing water, air, and nutrients to reach the roots of the grass. It also helps break up compacted soil, which can lead to drainage problems and make it difficult for the grass to grow. Core aerators are machines that remove small plugs of soil from the ground. This can be done manually with a shovel or pitchfork, but it's much easier and less labor-intensive to use a core aerator. Core aerators can be rented from most home improvement stores or garden centers.

There is no one "best way" to aerate your lawn, as the method you use will depend on the type of soil and grass in your yard, as well as on your own personal preferences. Some popular methods of aerating lawns include using a manual or mechanical aerator, broadcasting compost or other organic matter over the lawn, or simply walking over the grass while wearing spiked shoes.