Need Help with WURM pattern

Hi - I’m a fairly new knitter and found the WURM pattern for free on Ravelry - but have no idea what this part of the pattern means - if anyone has knit this pattern - I should would appreciate your help.

K

fold at purl round (with knit side facing and purl
side inside the double blending), pick up first st
from cast on edge and k together with live st, repeat
this for making a double edging of hat

You’re making a hem at the bottom of the hat. The purl round is a turning row because the fabric naturally wants to fold there. Fold it in and knit 2 stitches together for each stitch. One will be from the needles and one will be from the cast on edge.

The word blending seems to be a typo. :?? Anyway, I’ve made several hemmed hats and I like the look. I have this one bookmarked to try.

Welcome to KH!
This tutorial shows you the hem. You can pick up sts from the cast on edge one at a time or onto a smaller size needle rather than a crochet hook if you prefer. I agree with Jan, this makes a neat edge on a hat.