Hi there 
! This is my first community tutorial. I would love some feedback as I am still learning blender. I will be using blender 2.82 for this tutorial. Hope you like it!
PBR materials
PBR stands for Physically Based Rendering, it is a method of rendering a more accurate and visually predictable representation of how light acts on the material surface.
How this tutorial will help you
With this tutorial, GFX creator can enhance their gfx. 3D modellers can showcase their models. And very soon PBR materials are getting enabled inside Roblox Studio for everyone so this will give you a basic idea of how PBR materials work!
Stuff Required
For this tutorial, you will need;
1.) Blender Installed (2.8+ version)
2.) Download this Zip file
Let’s get started
Step 1
Delete the default cube
F in chat
Step 2
Shift + A > Mesh > Insert Grid
Step 3
Open the shader tab
You should see node editor
Step 4
From here starts the main part
Go to https://cc0textures.com/ and choose any material you want to use
Download your material and hop back in blender in the shader tab
Step 5
Click on the new button
A node basic material node will be added
Step 6
Extract the zip file containing your materials and drop them inside the node editor
For now, drop in your Normal, Roughness and Color Materials maps only
Color - This is your basic color map with RGB data
Roughness - This map holds the roughness data
Normal - This map creates a 3-dimensional relief on the material
If you are doing this correctly you should have these nodes
Step 7
Connect the Color Map to the base color of the Principle node
Now if you go in render mode you can see that your grid has color, but hey its pretty 2-D and non-appealing, thats because Color map only holds the color data. Lets add the Normal map now
Step 8
Press Ctrl + A in the node editor and search for “Normal Map” and insert it
Now connect the nodes like this
Make sure to set the Color space to “None”.
Set the Strenght in Normal to 10 for a good result.
our grid looks nice now, but let’s add a roughness map to make it even better.
Step 9
Do Ctrl + A in node editor and search for “ColorRamp” and Insert it
Connect the nodes like this
Make sure to set the Color Space to “Non-Color” in roughness Map
In the end, nodes should be connected like this
Step 10
Its done! 
Final render
Congrats you learned how to use PBR materials in blender, now play with lightning, settings to get a more immersive effect.
Blender File - PBRTuT.blend (601.1 KB)
link to download maps - https://cc0textures.com/view?id=PavingStones054
. My discord is