Pulling loops of the cable out

Hi! I’m knitting a hat with a circular needle. I haven’t learned to use dp needles. The pattern for the hat says:

When the top of your hat is too small to continue decreasing comfortably, you can pull small loops of the cable out in order to keep knitting.

I don’t understan what this means. Can anyone help please?

Traveling Loop Method For Magic Loop: One Loop Only