After the template and organization advice above helps you most in this category.
This might be a measurement of your power to use a wide number of grammatical structures without making a lot of grammatical errors. Before you take the IELTS, consider taking an English class or investing in a good grammar book for self-study if you have enough time (a few months or more. I often recommend this grammar book to intermediate and advanced students. It gives clear grammar explanations and contains many practice exercises.
Here are a few additional grammar tips to assist you, even in the event your IELTS exam is coming up soon and you also don’t have time and energy to take a course or study a textbook!