First, English is the most commonly used language among foreign language speakers. Throughout the world, when people with different languages come together they commonly use English to communicate.
Second, English helps you to improve friendship and maybe include our knowledge around the world. Nowadays, many people have a wider friendship around the world. So learning English is an important way to communicate with friends from another countries. I think it's great so we need to learn English.
Finally, we can find jobs more easily.