Hi Faeema
Highlighters are used to enhance certain features on your face. I personally cannnot live without my higlighter. I use it on my whole eye area before I do my shading, it just lightens up the eye area. when searching for a highlighter just choose a tanny light colour. When you buy a palette of three or four colours it normally indicates on the package which one the highlighter is and you will also notice that it is the lightest shade of the bunch.
Have fun
Stay Beautiful…Indulge Yourself