Need help with special pattern

i’m having trouble understanding these instructions:

Row 1 (right side): Knit into front and back of this stitch 3 times (6 stitches).
Rows 2 and 4: Purl.
Rows 3 and 5: Knit.
Row 6: (Purl 2 together) across row. (3 stitches)
Row 7: Slip 1 stitch knitwise, knit 2 together, pass slipped stitch over last stitch.

i don’t get how to knit on the front or back of stitch. what does that mean?:??

Each st has a front leg over the needle and a back leg, usually you always knit into the back leg. To kfb you knit into the front and leave it on the needle, then knit into the back leg too, making an increase and there’s a video on the Increases page. On this pattern you kfb 3 times into one stitch to make 6 sts.