The expression "p^n" represents a mathematical concept known as exponentiation, where "p" is the base and "n" is the exponent. This means that "p" is multiplied by itself "n" times. For example, if p = 2 and n = 3, then 2^3 equals 2 × 2 × 2, which equals 8. Exponentiation is a fundamental operation in mathematics and is used in various fields, including algebra, calculus, and computer science. It helps in expressing large numbers concisely and is essential for understanding concepts like polynomials and exponential growth.