GST, or Goods and Services Tax, is a unified, destination-based indirect tax levied on the supply of goods and services, replacing multiple earlier taxes like VAT and Service Tax, to create a single national tax, tax only value addition, and ensure the final burden falls on the consumer, with businesses getting credit for taxes paid earlier. It’s a multi-stage tax applied from manufacture to final consumption, promoting a simpler, transparent system with seamless input tax credits.