Listening is the most important communication skill and requires active attention to understand messages. Effective listening involves analyzing sounds, organizing patterns, interpreting meanings, and comprehending messages. It is the first communication skill learned but requires practice. There are many barriers to effective listening, including physiological, psychological, and environmental factors that can distract or limit attention. To improve listening, one must focus fully on the speaker, avoid distractions, let the speaker finish without interrupting, and provide feedback to show engagement.