Old Roast Duck IELTS - Focus on IELTS preparation

Is it really necessary to take IELTS reading notes? Anyone who knows IELTS knows that many advanced words and complex grammar will be involved in the reading passages of IELTS. Similarly, the reading material contains a lot of complex (interesting) information. How to control all the details in the IELTS reading articles? Is there any way to notice the meaning of these key words and the complex grammatical structure most efficiently? Can I concentrate on these important information