You will often have multiple ways to communicate a message to another person. Your choice of a communication channel should consider the amount of detail and context the message requires. The richness of a communication channel is determined, in part, by the ability to establish a personal focus for the communication. This means that a Facebook status update will be less rich than $,$ because:

You cannot respond immediately to what the person is saying

You are not getting as many types of information

You do not know that the person$$s message is intended for you personally