Bhujangasana gets its name from the Sanskrit words Bhujanga, which means a snake and asana which means pose. It is a back-bending asana, in which, your body takes the shape like that of a cobra's hood. That is why it is also called Cobra Pose in English.
Regular practice of this asana helps to strengthen your spine, chest, lungs, shoulders and abdomen and also increases flexibility.
This article talks about the benefits of Cobra Pose and steps to practice it correctly. Precautions and easy modifications of Bhujangasana are also discussed.