*PAYTM(Pay Through Mobile)**, thats the full form I hope.Its the best way to pay online if you want to avoid waiting in queue or in shops.
*PAYTM WALLET*
The best one if you usually use **UBER, GROFERS, FOODPANDA, JUGNOO, BOOKMYSHOW**and having access to many sites for smooth transaction.
And the most popular, coupon.WOW.plenty of them.but many having one limitation **"YOU SHOULD TRANSACT USING PAYTM WALLET TO USE/APPLY THIS COUPON"*