Psychologists say that the information received at the end of a conversation is best remembered. It is also true concerning any academic paper. That is why a conclusion is considered to be the most important part of any writing. Not sure how to write one? This article will help you understand how to write an effective conclusion.

1. You can start with a small transition in the last paragraph of the main body. This can be a hint for the reader that you are about to complete the essay and that he or she needs to follow closely. Keep in mind that although most essays start with a transition in the last paragraph of the main body, you don't need to do so if you feel like it is clear that you are finishing the essay.
2. Try to avoid hackneyed phrases, as they are considered clichés due to their frequent use.

E.g., In conclusion…

Summing up all mentioned above…

From these arguments, one can see...

3. Summarize the main ideas. Try to take into account every first sentence of each paragraph (your main sentence) and rewrite the key points in two or three sentences. This will lend credence to your essay by reminding the reader of what was discussed.
4. An effective conclusion should always summarize the ideas from the introduction and main body in other words than they were provided there. The reader has already read your essay, and there is no need to remind him or her of every point you've made.
5. Be concise. There is no definite canon for the length of your conclusion, but for most high school and university essays, it should be around 5-7 sentences. If it is less than that, you may not be able to summarize the key points of your essay well enough. If it is more than that, then most likely you are arguing round and round the subject.
6. Make sure to include your thesis to the conclusion. Remember, the thesis is the main topic of the essay, the thing or problem you write about. If a person reading your conclusion still doesn't understand your thesis, then you haven't conveyed the message very well.
7. Write on the subject mindfully. Sounding authoritative means are choosing the right words (and at the same time avoiding archaic words), relying on valid evidence from reliable sources, and believing in your writing skills. Don't apologize for your ideas, and don't use too specific language.
8. An effective conclusion should always conclude with a dramatic stroke. Your last sentence should be elegant, provocative, and to the point. This is easier said than done. But it all starts by illustrating the essence of your essay. Ask yourself, “What is my essay about and, what do I want to say?” and only then move on.
9. If you still lack inspiration, try reading essays of famous authors. It would be best if the essays are of different types for you to compare the styles of data submission. 

Based on: https://wr1ter.com/blog/essay-structure/conclusion