If there is any doubt then you need to think about how you can express your point in a simpler way, that has no mistakes.
After seeing your this specific introduction, I have become confident on what I inferred from your free book. Please see above for grammatical errors.
It is better to write in a simple way and make no mistakes, than use complex grammar and structures with frequent errors. Suggestions- Establish your common grammar errors and then review this grammar.
Though, I have kept this important point in mind- apart from this opinion mentioning in conclusion I need to make my position clear throughout the essay.
Your score will increase if you: pay attention to collocations which verb matches which noun paraphrase carefully to avoid errors use a range of words appropriate for the topic spell words correctly avoid making errors errors will lower your score — see table above avoid using informal language Grammatical Range and Accuracy The IELTS examiner will give you a band score for your sentence structures, the tenses you use, your control of grammar and also the number of mistakes you make.
Most people make the same grammar mistakes over and over again. You should also give yourself a few minutes at the end to evaluate your vocabulary and make sure you have not made any mistakes.