The VIA Chrome9 HC IGP (Integrated Graphics Processor) is a series of graphics chips developed by VIA Technologies. The WDDM 11 (Windows Display Driver Model 11) refers to a specific version of the graphics driver that is compatible with Windows 10 and later, as WDDM was introduced with Windows Vista and further updated in newer versions of Windows.
The VIA Chrome9 HC IGP was commonly used in older notebooks, motherboards, and small-form-factor systems with integrated graphics, primarily for entry-level applications and light multimedia use. If you're looking for the WDDM 11 driver for the VIA Chrome9 HC IGP, it's likely that you're dealing with an older system, as VIA's focus has shifted away from integrated graphics in recent years.