My bank sends me an alert when my card is used to make a transaction - handy for spotting fraud.

I get an alert when a payment comes it - handy for knowing if a client has paid.

I can quickly check my balance - handy for knowing if I can afford another round of drinks.

I can repay a friend in two taps - handy if they've paid for dinner.

Is anything essential? No. Is it something people use multiple times per day? Yes!