Why do people do mandalas?

I'm curious to know, why do people engage in creating mandalas? Is it purely for the aesthetic appeal, or are there deeper spiritual or therapeutic reasons behind this practice? How do mandalas help individuals connect with their inner selves and the universe? What kind of mindfulness or meditation techniques are often associated with mandala creation? And finally, how do the colors, shapes, and symbols used in mandalas contribute to their overall significance and meaning?