Rescale parameter in data augmentation

I'm a little bit lost about the rescale parameter in the ImageDatagenerator function. I know that the rescale argument by itself does not augment my data and that by doing rescale=1./255 it will convert the pixels in range [0,255] to range [0,1].

Currently, I'm only using random flips(vertical and horizontal) and 90º degrees rotations but I'm pondering whether or not I should add the rescale parameter.

My question is what is the advantage in doing that?

As rightly pointed out by you the rescale=1./255 will convert the pixels in range [0,255] to range [0,1].