GST is a umbrella where all the single tax system brought together and kept on a single platform if GST come to use the main advantage is for the perople as the cost of the products will be minimised
If I take a product value at today's market (ex A Xycle = Rs 5000 ) after GST the cost will be Rs 4200 for the final product but their are some products whose prise are going hike clothing, mobile phones, luxories items, debit cards, some food items things benifited by GST housing(construction), washing machines, TV, small cars. We can categories GST in various ways 0% tax grains etc, 5% mostly and widly used items, 12%-18% normal items, 28% luxury items .