Subsurface Scattering is used to create translucent surfaces such as wax, skin, and soap. Pulling off the subsurface scattering effect is mostly dependent on loading Subsurface Scattering into the luminance channel of a material and using a light behind the object you are applying the effect to.
In the below examples, we have the same Global Illumination lighting setup giving two different results on seemingly the exact same scene. What is the difference?
Both have a parametric cube and an Extrude Object with the Maxon logo, but the one with the more uniform translucency uses a Connect Object so Cinema 4D calculates them as one object opposed to two 3D objects. You could make all the objects editable and run the Connect and Delete command but then you lose the ability to make any changes to the text or soap.
Watch the tutorial below to see Subsurface Scattering in action.