when you and a friend meet at a public place, exchange number and have been communicating for a while via txt, you may both decide to start communicating via msn. can be called progression in mode of communication. both friends might be very shy due to fear to say yo.
ronny and misty wanted to chat on msn but both shy, especially misty due to her shyness. but they both felt communigression would be great even though it might be difficult to say yo initially.