Tipping etiquette: With old norms gone, how do I know when to tip?

Tipping etiquette — once relatively simple and straightforward — has been upended in the last few years, as a global pandemic, the rise of third-party delivery services and the proliferation of digital payments upend social norms.

Customers could once rely on a fairly standard 20% tip to reward good service from restaurants and other workers.

But automatic prompts from retailers to tip everyone — from the cashier who rings up your purchase or hands you a coffee to retail salespeople — have left many customers wondering, "Do I really have to tip for this? And if so, what's an appropriate amount?"