This tutorial explains the difference between diffuse, bump, and specular maps and shows how to use them to create realistic materials in cycles. In addition, I show how to use specular maps as a mask to combine two different materials on the same object.
See more of my tutorials at www.blenderjourney.com Enjoy 
ah, thanks for this, I was looking for some of these
Perfect tutorial for a beginner to a nodes system - like me
Made me understand better how it works.
And honestly - I don’t know why you apologise??
Thanks, I really appreciate the compliment. My goal was to try to help people new to blender/cycles. Glad to hear I was able to help you understand things a bit better.
Good job on the tutorials. You talk slower which is a good thing.
I’m not going to name names around here on who talks way too fast
sometimes because I’m sure you guys already know.
Anyways thanks.