Unity Temp Files

I have a number of very large folders related to Unity residing in "C:\Users\AppData\Local\Temp" (about 24GB to be exact) I'd like to reduce if possible but am not sure what can and can't be deleted. Could anybody shed some light?

Edit: I also have a C:\Users\AppData\Local\Temp\Unity\Cache folder @ 6.2GB

The "C:\Users\AppData\Local\Temp\" files are safe to delete. Ideally apps are supposed to clean up files they leave behind but that doesn't always happen. If you don't feel comfortable deleting files run Disk Cleanup (cleanmgr.exe), select "Temporary files", and it should remove them from there and other temporary folders.

What is the C:\Users\AppData\Local\Unity folder?