Hi and welcome to KH! When you knit the row you moved the stitches from the needle in your left hand to the needle in your right hand. Now, you're going to turn the needle with the stitches on it around and take it in your left hand. The yarn will be at the tip of the needle ready for you to work with it. Take a look at this video
from the Getting Started section of the Free Videos and watch how Amy switches needles at the end of the row. It's English method but there's also a Continental video if that's the method you're using.