A senior student is typically a high school or college student in their final year of study. In high school, seniors are usually in the twelfth grade, while in college, they are completing their fourth year of undergraduate education. This stage is crucial as students prepare for graduation and transition to the next phase of their education or career. Senior students often take advanced courses and may participate in activities such as college applications, internships, or senior projects. They may also engage in leadership roles within student organizations and participate in events like graduation ceremonies to celebrate their achievements.