In Microsoft Windows, there are built-in drivers that "just work" for many devices. You can see this with mice. You just plug them in and they start working. So you can see why Windows calls these drivers "Plug-and-Play" or PNP.
Windows also has PNP tablet drivers! These drivers don't have many features compared to manufacturer tablet drivers but they can be useful.
If you are just intending to use the tablet as a mouse replacement for pointing and selecting
They are useful for troubleshooting problems with the manufacturer tablet drivers
You can use them as a "last resort" if your manufacturer drivers are not working.
The key things you should know
Not all tablets work with Windows PNP tablet drivers
The drivers are extremely limited in what they can do.
pressure sensitivity - PNP drivers do support this.
tilt sensitivity - PNP drivers support this
There are a large set of limitations that come with windows PNP mode. And many of the things you will need to configure with a drawing tablet simply are not available through PNP mode.
You cannot control how to map the active area of your tablet to a display in any way
This means that mismatched aspect ratios for pen tablets which will result in distortion when drawing. More here explaining what this means: Matching aspect ratios
You cannot control what the buttons on the pen does
You cannot control what the buttons on the tablet do
Uninstall your manufacturer's tablet driver
Restart your computer.
When you computer starts back up it should be using the PNP drivers.
The easiest way to see if this how Windows is interacting with your tablet is to look at the system pointer.
Normally your pointer will look like this when you are using the mouse or when you have a tablet driver installed.
(NOTE: It's hard to do a screen capture of this pointer, so I had to rely on a phone camera)
If your manufacturer tablet driver is having problems, the PNP drivers may be a "last resort".
If you are having problems with your tablet, trying PNP mode can be a good diagnostic test to help identify if the problem is related to the manufacturer tablet driver or not. More here: Testing with Windows PNP drawing tablet drivers
When you install a tablet driver, basically the tablet driver takes over handling the tablet and windows no longer uses its PNP mode.
And so the PNP mode will not affect you anymore.
Every now and then I have windows use PNP mode even though a driver is installed. Typically this seems to happen when:
Windows is starting up and the tablet driver hasn't been started yet. For a little bit of time maybe a few seconds maybe 30 seconds you might see the PNP mode cursor. But then the tablet driver will start and it will go back to normal. I might see this happen once or twice a year on my windows machines
Sometimes when the tablet driver is having problems working with windows then you might see the PNP mode being used.
Windows supports PNP for lots of devices. For example mice or monitors. PNP is not limited to just tablets.
I plugged in a couple and their basic functionality worked subject to the limitations described earlier.
Intuos Pro Small (PTH-460) - does not work (I get the sense this was a deliberate Wacom choice)
Movink 13 (DTH-135) - does work
Wacom One M (CTC-6110WL) - does work
Test with:
Surface Pro 8
Windows 11
Krita
Results
Huion HS611
Position : works
Pressure YES
Tilt: YES
Lower button: detected
Upper button: not detected (?)
Wacom One Medium (CTC-6100WL) with CP-923 pen
Position: works
Pressure: YES
Tilt: YES
Lower button: detected
Upper button: detected
Wacom Intuos Pro Small (PTH-460) with Pro Pen 2
Nothing works
Wacom Intuos Pro Medium (PTH-660) with Pro Pen 2
Nothing works
Wacom Intuos Pro Medium (PTH-860) with Pro Pen 2
Nothing works
XP-Pen Deco Pro XLW (MT1592B) with X3 Pro pen
Position : works
Pressure YES
Tilt: YES
Lower button: detected
Upper button: not detected (?)
Huion Giano G930L with PW517 pen
Position : works
Pressure YES
Tilt: YES
Lower button: detected
Upper button: not detected (?)