The expression "a > b" indicates that the value of a is greater than the value of b. This is a common way to compare two numbers or quantities in mathematics. For example, if a is 5 and b is 3, then 5 > 3 is true because 5 is indeed larger than 3. In various fields, such as economics or science, this comparison can help in decision-making. For instance, if a represents profit and b represents costs, then a > b suggests that a business is making a profit, which is a positive outcome for its operations.