It is specific and focuses on one to three points of a single idea—points that are able to be demonstrated in the body.
It forecasts the content of the essay and suggests how you will organize your information.
All your details, evidence, or counter arguments should not only relate clearly to your controlling purpose, but should have the purpose of strengthening the essay.
Both the focus and content are strengthened and enhanced by the organization of the essay, which must follow an overall organization strategy.
It is not enough merely to discuss a general topic or simply answer a question with a yes or no.
You have to form a specific opinion, and then articulate that into a —the main idea upon which you build your thesis.
It is like a signpost that signals the essay’s destination.
You should form your thesis before you begin to organize an essay, but you may find that it needs revision as the essay develops.
You must insure that your readers will be able to follow the organization and easily make sense of it.
Furthermore, you should ask yourself whether or not your introduction and your conclusion could more effectively open and close your essay.