I googled it too. The video I found said it keeps the yarn from twisting in the back; I haven't done much with stranded knitting, just some practice, but twisting the yarn strands is something I've been working to do. Yeah, let us know how it works out for you.
I should never overestimate my basic arithmetic skills.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper
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