Scarification is the mechanical process to remove moss and thatch from your lawn. It is very good for your lawn and done routinely it will bring benefits both in appearance and long term grass and lawn health.
Moss thrives in damp and poorly lit conditions so tends to build up over the winter. Lawn thatch is the accumulated and compacted organic matter around the base of the grass plant – above the soil layer, but beneath and between the stems. Left in situ it can block good drainage (depriving roots of water) hinder new growth and can lead to thin patches in your lawn where the grass becomes less resistant to periods of drought.
Scarification should only be done in either spring or autumn when the conditions are right
Scarifying has a cumulative beneficial impact on the lawn, so it is a worthwhile investment in time.