What is a thesis statement? what should it include? what shouldn’t it include?

A thesis stament is a sentence that expresses the main idea, typically for an argumentative essay, essay, etc. You must be sure to include the main idea of the topic you are to write about, and do not talk off-topic.

A thesis statement is a summary of what's to come later in a paper.

Explanation:

Normally, the thesis has the topics for each body paragraph in a uniform list. For example, if I want to talk about chocolate, cake, and candy, then I'd make them a uniform sentence: I believe chocolate, cake, and candy are unhealthy to your body in many physical and mental ways.