Why is vocabulary important in english learning.

     Nowadays, English language is international language. The most of people around the world use English language to communicate. And as you know, english has 4  skills reading, writing, listening and speaking. In my opinion all of these skill are important and if you want to be a professional in english. You need to learn more vocabulary. I will show you why vocabulary is important in english learning. The first reason, in reading skill if we don't have more vocabulary when we read books, texts and passages. We will not understand and we can't finish reading. The second reason, in writing skill when we want to write something in english if we don't have more vocabulary. That make we can't create a new ideas in our work and make our writing aren't effective. The third reason, in listening skill, if we don't have more vocabulary when we have communicate with the foreigners, we will not understand  what they say because the foreigners have more words to speak with you. And sometimes in music, text books and newspapers there are many slangs and specific words. That make we hard to understand. And the fourth reason, in speaking skill, speaking skill is necessary skill to communicate with the other people. May be we don't have many words to show our main ideas to the foreigners. If we don't have more vocabulary that make we can't present our ideas and you will fail in conversation. So I think if you want to be an expert in english learning. You need to improve more vocabulary because that will improve your english skill be better. And what do you think about vocabulary. Is it important in english skill? Please, give me some ideas.