Aeration, as recommended by your technician, is a machine process, which is driven over your lawn removing cores of soil (approximately quarter size) and approximately 2" to 3" deep to allow oxygen, water and nutrients to penetrate more efficiently into the root zone.
This is commonly recommended in areas of compact soil (small areas or entire lawns in some cases) where new construction has occurred or high foot traffic occurs. When the thatch layer is more than 1/2 inch thick. Heavy equipment use during home construction or areas used by dogs to move about the yard on a routine basis, and play areas for kids are common situations where aeration may be recommended. Remember, we offer this as an aid to your lawn not a cure.
Your results may vary depending on your problem, turf condition, sunlight, and soil composition. If you have an area that needs to be aerated, it typically will need to be done annually, especially if the cause of the condition is not alleviated. Cost is based on square footage.