Fringe is an embellishment. It is often used on the ends of scarfs, or as tassels on hats. To apply fringe you can sew it on, or use a crochet hook to easily attach it.
How to apply fringe using a crochet hook
First: Insert hook into BO, CO or SC from underneath.
Second: Fold fringe length in half over hook.
Next: Use hook to pull fringe through fabric.
Then: Use hook to draw cut ends through loop.
Finally: Pull ends to secure fringe firmly to edge.
Other knitting embellishments include beaded corners, decorative i-cords, and looped pom-poms.