Generally, you've been working in the round. For the pocket section, they want you to work back and forth (hence the 'turn' )for the area between the pockets.
a) knit 85 stitches, and although there are still stitches left in the round, you turn your work because you will be working back and forth for a while on the 52 stitch 'segment' that will be the part behind the pocket that you already knit.
b) after you turn your work, you'll purl 52 stitches and turn again
c) Now you're decreasing at the ends of this 52 stitch 'segment'
Repeat for the number of rows stated and put those stitches on a holder.
Then you'll start knitting in the round again, and in the space where you had the stitches on a holder, you'll knit on one edge of the pocket and work in the round for 29 rows.
To attach the other edge of the pocket, you'll be knitting the stitches from the pocket and the stitches from the holder together, one from the pocket and one from the holder (after you put them on a needle) and then continue in the round.
I think that if you get the idea of how this whole thing goes together, the directions make sense.
Good luck with it, and if you have any more questions, feel free!