Why Asia wants India’s BrahMos missile

India is reportedly on the brink of sealing a $700 million deal with Vietnam for the sale of BrahMos supersonic cruise missiles.This is a big move for both countries and could happen in just a couple of months. And this comes soon after the Philippines struck a $350 million deal with India for the BrahMos missile. Now, what exactly is the BrahMos missile? And why does it matter so much to India’s defence export ambitions?