This is a soothing pose as it stretches the front of the body, the intercostal muscles (around the ribs) , throat, chest and abdomen . It is an important pose for pregnant women as it strengthens the back of the neck.
It also helps in preparing you for breast-feeding. There is a lot of neck strength required to ensure your baby is feeding well during the initial weeks.
Disclaimer: All the exercises demonstrated in the videos need to be done under the supervision of a trained practitioner at the start, until one is proficient and comfortable to take these up individually. Even then, if at any moment there is any discomfort , one must stop and consult a trained practitioner.