Why do we listen to lung sounds?

Could you please explain why it's important for us to listen to lung sounds? I'm curious to understand the significance of this practice in medical diagnosis. Could you elaborate on how listening to lung sounds can assist doctors in detecting respiratory issues? Is it a reliable method, and what kind of conditions can it potentially reveal? I'm particularly interested in the scientific basis behind this technique and how it fits into the overall diagnostic process. Thank you for taking the time to answer my questions.