Organic design uses shapes and forms that feel inspired by things in nature, such as leaves, waves, or rounded stones. In a website, this might mean flowing curves instead of a screen full of sharp boxes.
For example, a wellness app might use soft curves and leaf-like shapes to create a gentle mood. Those shapes can help the product feel warm and less mechanical.
Organic does not mean unstructured. Text and buttons still need clear places, and decorative shapes should not make the page harder to use.