Well nevermind if you dont know what it is yet. You can just put it in one of the free projects from the marketplace and you’ll see it having proper reflections.
And please, go through this documentation whenever you have time for your own good so that you wont have to wait for an answer in the forums for everything and waste your time. Even the best of us heads there every once in a while so dont let it make you feel like a noob. 
https://docs.unrealengine/latest/INT/index.html
And dont forget Unreal Wiki for some handy bunch of tutorials!