The Xpert 98 PCI L1 is a graphics card produced by S3 Graphics, and it's part of the S3 Savage4 series, which was popular around the late 1990s and early 2000s. The Xpert 98 PCI L1 was a budget-oriented graphics card designed to work with the PCI interface (not AGP) and was typically used in personal computers to provide graphics acceleration for tasks like 3D gaming, video playback, and general desktop use.
The Xpert 98 PCI L1 Windows driver is the software package that allows your Windows operating system to communicate with and utilize the full capabilities of the Xpert 98 PCI L1 graphics card. Without the proper driver, the graphics card may not work correctly, or Windows may revert to using generic graphics drivers that don't support advanced features like hardware acceleration, 3D rendering, and optimized performance.