Credit card mostly help you to build a very good credit score(CIBIL) if you can maintain it properly and pay dues on time.
Most of the credit cards comes with a 45 to 50 days of credit time to repay with zero interest policy. so its a free money to utilize if you have good Financial Knowledge.
Most of the credit cards allow you to do online and offline payment hassle free and have a good back-end team to give support anytime. There are a few online sites you can only make payment through credit cards only.
Most of the credit cards come with very attractive rewards and cash back offers with a lot of online discounts.
Every credit card gives you optional future payment that is called EMI payment policy. If you do not have any money to buy something right now that you want to, can opt to go in monthly small payment.
If you have a credit card it is always a wise decision because in a emergency situation it can be very handy to fulfill your cash absence.