What is wd in camvid lesson 3?

[mvp354]

wd=1e-2

learn = unet_learner(data, models.resnet34, metrics=metrics, wd=wd)

What is wd doing here ?

[JonathanSum]

Weight decay. I remember it suggested that the explanation of it is in the following videos.
Or maybe it is pointless that I explain it here because you may know what it is.
It is just two lines of code, but it is very useful for training small data or to avoid overfitting.

[mvp354]

Thankyou so much