This document discusses the introduction of an essay. It explains that an introduction gains the reader's interest, informs them about the topic, provides tone, and presents the thesis while previewing the major supporting points. The introduction includes a lead-in or "hook" to engage the reader, discusses the topic, and states the thesis. Various types of hooks are described such as general statements, anecdotes, descriptions, definitions, counterarguments, questions, quotations, facts/statistics, and noting the importance of the topic.