Parametric modeling is a design approach that uses parameters or variables to define the geometry and behavior of a model. This means that changes to one part of the model can automatically adjust other related parts, making it easier to explore different design options and maintain consistency. In fields like architecture and engineering, parametric modeling allows for greater flexibility and efficiency. Designers can quickly modify dimensions, shapes, and materials, which helps in optimizing designs and reducing errors. Software tools like Rhinoceros and SolidWorks are commonly used for creating parametric models.