Why seasoning of timber is done?

Seasoning of timber is done to reduce the moisture content in wood so that it is less likely to warp, swell, shrink, or splinter. It also helps to improve the service life and durability of the timber. 

Seasoning also reduces the risk of mold, mildew, and insect infestation, and prevents the growth of fungi. Seasoned timber is also easier to work with because it has higher stability and is less likely to crack during milling, sanding, and other operations.