I would say look at exams from people with top marks, you can find some of these online if you search your GCSE and Spec. I got an 8 at GCSE, a lot of it is just memorising and knowing how to apply knowledge. Try active recall, make mindmaps and revisit them after a few says and consolidate what you know. Blurting is amazing and helps you to fill in the gaps of your knowledge. Regarding actually understanding the question, I would say make sure you pick out the key words such as 'evaluate' 'assess' 'to what extent' so you know exactly what it is asking from you. in your conclusion of paragraphs, make sure you are always referring to the question. And most importantly, make sure you are actually answering the question. I find that I got higher marks because I said which factors were more important than others, for example, the role of deforestation contributes to higher carbon in the environment than a growing population. This shows analysis which gets you the highest mark.
I don't know if this really helps to be honest because I struggle with trying to understand what the question is asking me, but this is what works for me.
Hope this helps!