Triode saturation, cutoff, amplification, what are the characteristics of each?

Triode amplification and saturation, characterized by the base to the emitter is positively biased, saturation, CE voltage is closer to the general below 0.5V; amplification of the CE voltage is about 1/2 supply voltage or so.

Transistor cutoff characteristics: base to emitter reverse bias, the voltage between the CE is close to (or equal to) the supply voltage.