Alexander-Briggs notation is a system used to represent the structure of mathematical expressions in a clear and organized way. It helps in understanding the hierarchy and relationships between different components of an expression, such as operators and operands. This notation is particularly useful in fields like computer science and mathematics for simplifying complex expressions. The notation employs a set of symbols and rules to indicate how expressions should be grouped and evaluated. By using parentheses and specific symbols, it allows for unambiguous interpretation of expressions, making it easier for both humans and machines to process mathematical information accurately.