Parametric curves are mathematical representations of curves where the coordinates of points on the curve are expressed as functions of one or more parameters. Instead of using a single equation, parametric equations define both the x and y coordinates separately, allowing for more complex shapes and movements. For example, a circle can be represented parametrically using trigonometric functions. These curves are widely used in various fields, including computer graphics, physics, and engineering. By manipulating the parameters, one can easily create animations or model the motion of objects. Tools like Matlab and Python often utilize parametric equations for simulations and visualizations.