Paytm is m-commerce website, means you can shop as well as its a digital wallet also through which you can easily put your money in your wallet upto Rs.10000 and use it for different purposes like recharge, paying bills and many more things. You can also pay your bill directly without put your money wallet directly through debit card. Its a secure website with SSL protection so your payment will be safe.
You can shop everything from electronics, books, and mostly everything an e-commerce website is providing.
A good app finally with lots of stuffs!