Desmos is a versatile graphing and teaching tool for math, accessible on the web and mobile devices. It offers equation plotting and interactive classroom activities to help students explore math concepts, such as transforming functions and experimenting with graphs using sliders. Students can enter unlimited mathematical expressions and see immediate visual results, enhancing both learning and creativity. The platform allows users to click on graphs to find coordinates and features like maxima and minima. With a free account, graphs can be saved for later use. Desmos supports accessibility needs with features like audio trace and braille-display support, though not all activities include these.