How to show the other side of the argument in an opinion essay.
In an opinion essay you need to clearly state your opinion, back it up with details and give examples. I usually advise my students to choose one side, either agree or disagree, and stick with that. You do not actually get a higher band score for a balanced approach so it is safer to choose one side and stick with that view throughout the essay. Remember that your opinion must be in the introduction, body paragraphs and the conclusion.
However, something that will showcase your language ability is to show the other side of the argument or a concessions, this helps to balance the essay. This gives the essay good coherence and you can demonstrate your grammar skills if you feel confident with your grammar. However, this should be done carefully, because you still have to maintain your own opinion and not contradict yourself.