PCB is a circuit board. It is made of paper, plastic or metal and can have traces on it. A PCB consists of many layers of material and each layer has a specific function. Selecting the components required for your project. Layout the components on the board using a schematic diagram or drawing. Try this https://masterbundles.com/graphics/textures/ site for best textures. Creating a mask for each layer of copper in the PCB, so that no copper tracks are exposed as open circuits, which can cause shorts or other damage to your device when it is being used in an operational environment.