Think of yourself as a member of a jury, listening to a lawyer who is presenting an opening argument. You'll want to know very soon whether the lawyer believes the accused to be guilty or not guilty, and how the lawyer plans to convince you. Readers of academic essays are like jury members: before they have read too far, they want to know what the essay argues as well as how the writer plans to make the argument.
Impress Film Festivals. A Writers or Directors Statement explains your motivation, inspiration, or challenges while creating your film or screenplay.
Supporting details are pieces of information which add additional facts to explain and bolster an opinion, claim, or belief.
Using English for Academic Purposes: Information and Advice for Students in Higher Education