The Marvell Yukon 88E8059 PCI-E Gigabit Ethernet Controller is a network interface controller (NIC) used for Ethernet connectivity in desktop and laptop computers. It supports high-speed gigabit Ethernet (1 Gbps) connectivity over a PCI Express (PCIe) interface. This component typically appears as part of your system's network hardware, allowing the computer to connect to wired networks.

To use this controller, you need to have the proper driver installed on your system. A driver is a software component that enables the operating system to communicate with hardware devices, such as your Ethernet controller.