Use both. Deposit / withdraw huge sums at the bank, always. For small payments, use online banking.
Depending on the bank, online security can be a hit or miss. Are your grandparents ok to learn and do stuff like secure passwords, 2FA…etc? If they are, go ahead with online banking. If not, there is nothing wrong with do the transactions at the bank.
Use both. Deposit / withdraw huge sums at the bank, always. For small payments, use online banking.
Depending on the bank, online security can be a hit or miss. Are your grandparents ok to learn and do stuff like secure passwords, 2FA…etc? If they are, go ahead with online banking. If not, there is nothing wrong with do the transactions at the bank.