1) The document discusses active listening as an important communication skill based on empathy that involves paying attention to both what is said and unsaid, providing feedback through paraphrasing and questions, deferring judgment, and responding appropriately.
2) Key aspects of active listening are paying attention without distractions, showing engagement through nods and facial expressions, reflecting back what was said, asking clarifying questions, summarizing periodically, allowing the speaker to finish before responding, and treating the speaker respectfully.
3) Barriers to effective listening include personal factors like preconceived biases and stress, as well as environmental distractions, while active listening tends to create trust and openness in communication.