I initially started using paytm because of it offers and cashback policy. They provide items at amazing prize. I bought philips headphones worth 250 as on other sites like fipkart, amazon etc for 55rs on first user offer. The best thing is a you can use cashback for recharges and all.
Paytm wallet is one another feature. You can go cashless. Transfer money to your friends using wallet. I mean if you really want to buy porduct at low price: Go paytm.