You need to think very carefully about how to end an essay because this will leave an impression on the marker, or your readers. If your conclusion is lame, abrupt or not relevant to the main body of the essay, you cannot expect to get good grades for it. A good ending is essential.
The ending is your last opportunity to persuade a reader that your point of view is the correct one, or that you are an authority on the topic.
Your ending should be linked to the first paragraph in some way and leave the reader to ponder the possibilities you have suggested or implied throughout the essay. Your ending should have a sense of completeness, but it should not kill off the possibility of further discussion of the topic.