what is the Gst benefit or loss

Sir mere ko koi help krenge, agar mai without gst koi business karta hu to Loss kya h. Or benefit kya h. Or log bolta h ki gst return milega to kaise milta h. Jo return milega uska kaise benefit le skta hu. Plzz aap log mera help kre ku ki mere papa k business h to y nhi samagh me aarha h,