- GST is an indirect tax introduced in India on July 1, 2017 that unified several indirect taxes into a single tax. It is levied on the supply of goods and services. - GST aims to eliminate cascading of taxes (taxes on taxes) and create a single, unified Indian market by reducing interstate variations in taxes. - It has multiple tax slabs (0%, 5%, 12%, 18%, 28%) and is administered through a dual GST model where both the central and state governments levy GST on a common tax base.