The main points of your essay are in the body paragraphs. The conclusion - as the same suggests - concludes your essay by giving a brief summary of your essay or by coming to some conclusion based on what you have written in the body paragraphs
the first paragraph is the introduction. the next 3 paragraphs are the body with all the information. and the last paragraph is the conclusion which is basically a short summary of what you just wrote.
You may have as many paragraphs as you need. A story is considered between 2,000 and 7,500 words, so when you hit that word count, the number of paragraphs you have is the number of paragraphs you need!
Body paragraphs should include things or the topic you are describing for your task and you support it with reasons or evidences. In the conclusion, you should sum up everything you wrote on the paper and write the conclusion like a small summary.