Who is Bharat Mata & slogan 'Bharat Mata Ki Jai' is for whom?

Since independence Indian politicians try to awaken the masses with the slogan 'Bharat Mata Ki Jai'. Often times, the political leaders initiate their speech with the help of this slogan and end with this as well. Pandit Nehru in his book 'Discovery of India' has tried to answer the real essence of the slogan 'Bharat Mata Ki Jai'. Watch the video to know the details.