The puff stitch is very useful when crocheting amigurumi doll hands. You use either a half double crochet [HDC] or double crochet [DC] cluster depending on where and who you're learning from. You don't need to have this to make doll arms, but it just adds a nice advanced-looking aesthetic to the crochet doll.
Please like and comment what other amigurumi technique you'd like to see me make.
Keep Count and Stay Creative, my friends!