What is the importance of vocabulary in the study of english language?
The importance of vocabulary in the study of the English language is improved communication. Knowing the appropriate vocabulary helps you communicate easily, hence understand each other. It also enables you to develop other life skills. Read more from http://www.pebc.org/wp-content/uploads/2010/01/August-Critical-Role-Vocab-for-ELL-2005.pdf.
The English language is complex with nuances and details, the more you increase your vocabulary the better grasp you have on the language and the better you can describe situations, emotions, scenes etc to get your message across.