What you are referring to is called "garter stitch" = what happenes when you knit every row.
And "turn" means when you end one row, then you TURN the needle that it's on and put it in your other hand, and then start working on it.
When you knit on straight needles, you have a RIGHT side, and a WRONG side, every time you turn it, you are switching sides. Therefore if you knit on both the right side and wrong side (front and back of your work) you will end up with the garter stitch you are describing. Remeber as well that a knit stitch is basically the opposite of a purl stitch, meaning that if you did a row of knitted stitches on the RIGHT side, when you turn the work to work on the WRONG side, it will look like a row of purled stitches.
I hope that helps!!