Place value charts are used to help visualize and understand the value of digits in a number. They are a helpful tool for teaching and learning place value, especially in math education. A place value chart organizes digits into different columns based on their place value, such as ones, tens, hundreds, thousands, etc. This allows students to see the relationship between the digits and their value in the overall number. It helps students understand the concept of "ten times" as they move from one place value to the next. Overall, place value charts serve as a visual aid to enhance understanding and mastery of place value in numbers.