The expression "g^2" represents the mathematical operation of squaring the variable g. This means multiplying g by itself, resulting in g times g. Squaring is a common operation in algebra and is used in various mathematical contexts, including geometry and physics. In practical terms, if g equals 3, then g^2 would equal 9, since 3 multiplied by 3 is 9. Squaring numbers can help in solving equations, analyzing data, and understanding relationships between different quantities in mathematics and science.