How Can I Make My Ideas Stronger?

I have written an English assignment, but some paragraphs feel weak. While looking for feedback, I found English academic writing service. I want to improve my own work and understand where my ideas need more detail. Should every paragraph have one clear main point? How do you know when you have explained an idea enough? I would appreciate suggestions from other students. What helped you make your academic writing clearer, stronger, and easier for others to understand?