1. At the end of your introduction: The thesis statement is usually the last sentence of the introductory paragraph. It acts as a roadmap for your essay, clearly stating your main argument and the points you'll be discussing.
2. In the body paragraphs: While the thesis statement is typically in the introduction, it can also be restated (sometimes slightly modified) in the conclusion to provide a sense of closure and reiterate your main point.
Remember, a strong thesis statement is specific, arguable, and concise. It should not be a fact or a statement of personal opinion; it should be a claim you are going to prove with evidence throughout your essay.