GST Concepts Overview, Download PPT File on GST Overview. GST Basics covering Definition Input Tax Credit Valuation. To understand GST in layman language, it can be stated that GST is a destination based consumption tax levied at multiple stage of production and distribution of goods and services. It’s a Dual GST Model i.e. it will comprise of Central GST (CGST) and State GST (SGST). The centre will administer CGST and the individual states will administer their respective SGST. Now Download PPTX File on GST Concepts Overview from below..