The document is an introduction chapter from a book about preparing for the SAT. It discusses who takes the SAT (most college-bound high school students), who makes the SAT (the College Board and Educational Testing Service), what the SAT is used for by colleges (as part of an evaluation process to decide if a student will be a good fit, along with other factors like grades, activities, and character), and what the SAT is (a standardized test that measures critical thinking skills that will be useful in college). It encourages students to present their best qualities to colleges in a diverse way through grades, activities, community service, athletics, arts, leadership, and interests.