Well paytm is an app, you can use it for any online transfer or payment. Most of the restaurants also supports pay by paytm.
You can send monet to your friends anytime or also you can transfer that money to your bank account. The transfer fees to bank account is only 1% of the toal amount if you upgraded your wallet otherwise its become 4% .
Also if you don’t upgrade your wallet your monthly transaction limit is only 10, 000.Otherwise overall a good app very useful.Use it daily