> Quote - Ju st can't tell very well from that one where / how to connect the dots ... nodes ... whatever ...

How about this? Red and blue make purple, yeah? SO...lets try taking the color red and the color blue and mixing them together inside the Material Room.

New Node>Math>Simple Color. Make this Red.
New Node>Math>Simple Color. Make this Blue. New Node>Math>Blender.

Into the Blender node, plug Simple Color:Red into "Input_1"
Into the Blender node, plug Simple Color:Blue into "Input_2"

Blender node "Blending" should be set at "0.5"
Congratulations! You now have the color Purple!

So...a Blender node blends things together. Blender can blend two skin textures together or...mix two specular types together so you have Gloss and Blinn at the same time! The uses are endless, but let's keep it this simple for now: Blenders mix things, like colors.