The Approximation Pattern is a schema design approach that allows for the use of "good enough" numbers in applications where precision is not critical, thereby significantly reducing the resource demands associated with calculating and writing exact data. This pattern is particularly useful in scenarios with high data volume or user numbers, such as city population tracking or website view counts, where calculating exact figures can be resource-intensive and unnecessary. By incorporating a counter that updates only when certain thresholds are met, applications can decrease database writes and conserve resources, ultimately enhancing performance and reducing architectural complexity and costs. This pattern does, however, require implementing approximations within the application itself and accepting that exact numbers will not be represented, trading off some precision for improved efficiency.