A high school diploma is an official document awarded to students who successfully complete their secondary education. It typically signifies that a student has met the required coursework and passed necessary exams. This credential is important for further education and employment opportunities. In many countries, including the United States, a high school diploma is often a prerequisite for attending college or applying for certain jobs. It serves as proof that a student has acquired essential skills in subjects like math, science, and language arts, which are vital for success in both higher education and the workforce.