PC Master Race

The Intel Chipset Device Software installs the Windows* INF files. An INF is a text file that provides the operating system with information about a piece of hardware on the system. That information is primarily the product name for the piece of hardware. This allows the operating system to show the correct name for that piece of hardware in Device Manager.

Typically the download from your manufacturer's website is sufficient as it has the information for the hardware relevant to your system. Newer versions from other sources (like Intel) will cover newer hardware that probably doesn't exist in your system.

You'd know if you need one if you've got unknown/unidentified devices in the Device Manager. But these days, you should be able to get most of your drivers directly from Windows Update. Since you've got your WiFi working already, you should just run a Windows Update and install any optional updates. You can also go to the Device Manager > Right click on any unknown device > Install Driver and select Windows Update as the source.

Also, ideally it's best to install drivers from the laptop manufacturer's website, as it'll be a better match for your hardware. Only install from Intel etc if the system manufacturer's driver is quite oudated (usually the case if the laptop is a few years old and out of support), or if there's a critical vulnerability in the driver which justifies doing the update.

Maybe it's already included in Windows. Go check Device Manager. Devices without drivers will show up with a yellow warning sign next to them. Presumably it is working, without a chipset driver lots of other stuff wouldn't work either.