The first row sets up the routine with the markers in place, be sure to move them when you reach them. Your second row is purl all stitches. Your third row instructions will be in your pattern. You keep the single stitch between the markers knit on the right side and purled on the wrong side of the work. Your increases are done before the marker, or in the last stitch before the marker, or after it, move the marker, knit 1, move the marker to the left needle and increase before the next stitch. If your pattern doesn't tell you how to increase, there are ways to do this. Usually the pattern tells you which one. The easiest one is M1,which means Make 1 and you do that by knitting to the marker, with your right hand needle pick up the loop between your last stitch and the marker, put it on the left needle with a twist and knit in the back of the loop, you have just made a new stitch. Move the marker, knit 1, move the next marker and repeat the M1, Make 1 and proceed to the next marker.
Increases are usually done on every right side row but read your pattern in case there are some plain knit rows. Trust your pattern directions and come back for more help when you need it.
Carol J.