Yfwd, sl 1, K1, PSSO
Patterns often have instructions for the technique used on that particular pattern. Based on what you have asked w/o seeing the pattern:
Bring the yarn forward between the needles, slip one stitch from left needle to the right, knit one, then take the slipped stitch and bring it over the knit stitch.
If the pattern goes on to knit you most likely would then move the yarn back between the needles to knit normally.
BTW..having a link to a pattern when you ask questions is often helpful.