GST (goods and service tax) is a proposed bill that will replace India's current taxation system with a single tax across the entire country, removing multiple taxes. It will include CGST (central GST), SGST (state GST), and IGST (inter-state GST). The GST is expected to boost India's economy by reducing the tax burden on consumers, increasing manufacturing in India, and providing other benefits like easing business costs and stimulating the GDP. For the GST bill to be cleared, it requires ratification by at least 15 states and must pass in the Rajya Sabha and Lok Sabha before receiving presidential consent.