Physically, this asana is known for improving the health and function of the lungs. It can also help with weight loss - especially from the back and the hips - and stretches the spine.
On a spiritual level, vajra kapotasana opens the anahata (heart) chakra. Activating this chakra helps the yogi deepen their feelings of love, openness and self-acceptance. Practicing this pose is also linked to a deeper, more contemplative meditation session. Finally, it can help deepen the yogi's sense of harmony.