The Marvell AVASTAR Wireless-AC Network Controller is a driver that supports Marvell's AVASTAR Wireless AC series of network adapters, typically used in laptops or desktops to enable Wi-Fi connectivity. This driver allows your Windows operating system to communicate with the Marvell wireless network adapter, enabling it to connect to Wi-Fi networks, manage wireless settings, and ensure stable communication with wireless routers or access points.

The AVASTAR Wireless-AC controller typically supports Wi-Fi standards such as 802.11ac (Wi-Fi 5), 802.11n, and sometimes older standards like 802.11g or 802.11b, depending on the specific model of the adapter.