In this video, the teacher guides students on how to write a memorable conclusion for their essays. They emphasize the importance of leaving a lasting impression on the reader by using a "nip" - a thought-provoking statement or call to action. The teacher provides examples and encourages students to think in new ways, consider implications, and make pleas to engage their audience. By following the three steps outlined, students can effectively conclude their essays and leave a lasting impact on their readers.