Need help for "neck edge"

I’m doing a baby cardigan and I don’t understand this part for the neck edge. It’s from and I can’t seem to get a hold of anyone there to help me out.

Shape From Neck

(There are 21 stitches on needle)
**Bind off 3 sts at beginning of next row. Bind off at neck edge 3 sts once, then 2 sts 0 time - 15 sts. ** Purl 1 row even.

Does this mean that I just bind of 3 stitches at the beginning and at the end of the row…Don’t understand this part
"then 2 sts 0 time"

You can’t BO at the end of a row, so some of the BOs will be at the beg of a WS row. Your size may not need further binding off after the 3 sts once so just ignore it.