You need facts to make decisions, to make plans, to remain productive. And to do all those things you must be a skilled listener. Barriers to effective transmission of communication are legion. Some of the most common follow. Lack of interest, boredom, or laziness.
People sometimes fail to listen because they are uninterested in the subject being discussed.
They choose to tune out simply because they believe that the subject has no real bearing on their job, their life, or their concerns. Others become bored with the presentation or conversation and just quit listening. Still others lose their concentration out of sheer laziness. Noise or distractions. Language and vocabulary problems.