Plywood is a thin sheet of wood which are put together to have strength and durability. The quality of plywood entirely depends on the usage of the types of adhesive to glue them together. If the adhesive used is strong and long lasting then it will automatically make the plywood better and durable. It is considered as the most important factor in determining the quality of the plywood. A plywood is better than the normal plain wood, as it helps in resisting from shrinking, cracks, warps and twists. The different types of plywood depends on the composition of the material and its usage.