To be able to listen well gives you confidence in your communication skills. You can only speak sensibly when you can understand what is said. Failing that, you may miss important information presented to you, or respond in a funny way. Listening
in everyday life is a real-time skill. Unlike reading, you often don't have the chance to adjust the pace of speech, listen again, or check an unknown word. The need to understand what you hear on the spot makes it even more crucial that you develop the ability to listen well.
Do you think that listening is about understanding every word that is spoken? If so, think again. Even though good listeners may be able to get every word that they hear, this is not their concern most of the time, as our experience with our first language tells us. So specify your listening objectives when you carry out a listening activity. As long as you achieve your objectives, you are a good listener - whether you catch every word or not