This is one of the basic crochet stitches that beginner's should learn, a Chain Stitch. Here is a photo tutorial to guide you in your crochet journey.
Make a slip knot, a loop onto the hook.
Pull a new loop through the loop of the slip knot : one chain made.
Repeat until you have made the number of chains.
This is what the chain stitch looks like in right side.
This is what the chain stitch looks like in wrong side.