Vocabulary is one of the must-have skills and contributes up to 25% of your total score. Having a good vocabulary can help you understand the questions better and may also help you answer in a more confined manner. It plays a crucial role, especially in the reading and writing section. There will be three passages in the IELTS exam. You must note that the language used in the passages will not be that simple. Therefore, you should pay attention and try to gain a good command of vocabulary before appearing for the exam.