‘Optimization’ is a parameter that allows choosing the balance between Touch speed and Touch smoothness. Factory settings are halfway between Touch speed and Touch smoothness in Skin Ultra and Skin Fit, in Skin Dualtouch factory settings slightly favour touch speed. You can change this default value to optimize the Touch experience in accordance to the desired usage.
If you want more Touch smoothness, you can increase it by increasing the optimization level. This may be useful for drawing or writing.
If you want more Touch speed, you can decrease smoothness to gain speed by decreasing the optimization level. This may be useful for non-precision activities, like touching and manipulating buttons and images.
You should always try to establish an adequate compromise between precision and speed in accordance with the application content and user experience you want to provide.