It means to flip or turn your work to another side before the end of the row and work your way back where you start or to the point where pattern tells you to. This is commonly seen on short row projects.
Here is an example of turning method I worked on my potato chip scarf. It might help you to see it more clearly. The first few minutes might be a little bit too boring for you, though.
Hi, If I started off with 140 stitches, Then I had to knit 5,YO,SSK (k4, yo, ssk) to end of row except last 8stitches, those are knitted. How much should