Im almost done with my first baby sweater!But i need your help

What does “sm” mean in a pattern?? pls help. im almost done!!!

You will continue the edge decreases as set above while doing the raglan shaping as follows:
Row 1: K1, ssk, knit to 3 stitches of the first marker, ssk, k1, sm, knit to the next marker, sm, k1, k2tog, knit to 3 stitches of the next marker, ssk, k1, sm, knit to next marker, sm, k1, k2tog, knit to last 3 stitche, k2tog, k1.
Row 2: purl
Repeat rows 1 and 2 until piece measures 8” from CO edge.
Now decrease every row for the edge stitches for 5 rows as follows:
Row 1: same as above
Row 2: P1, P2tog, purl till last 3 stitches, take second stitch on left needle, and pass it over 1st stitch, now purl that stitch, p1.
Next row, k2tog throughout row.
Purl 1 row.
BO.
Pick up and knit 30 stitches along neck edge, and knit 1 row. BO loosely.
Use the 3 needle BO for the underarm stitches on holders. Weave in all ends. Sew ribbon at each edge of wrap, right before the beginning of the decreases. Slip bpw through the whole, tie bow

Slip marker. Just move it from the left needle to the right one.

I believe “sm” means slip marker. You are simply transferring it from one needle to the next as you are knitting. In other words, you need to keep the marker included in your work by not removing it from your needles, just slip it from your left needle to the right needle and continue with your pattern.