Google Pay is exactly what it sounds like—a way to pay for things with your phone. Anytime you pay for a Google service like more storage space for Google Drive or a YouTube Premium membership, your payment type is added to Google Pay. You can also add your loyalty cards, event tickets, boarding passes, and coupons to use at your favorite stores. (Google Pay is available on Apple devices but only allows money transfers.)
When you use Google Pay, the merchant receives an encrypted number, not your card number. This makes you immune from the hacks of merchant pay systems that seem to happen so often now. Google Pay will only work on phones with a PIN, pattern, password, fingerprint, or retina scanning screen locks. Less secure methods of unlocking your phone won’t work.
Information stored in Google Pay can be used to fill in forms within the Chrome web browser. Most apps will accept Google Pay which will save you from entering card details each time and will reduce the number of merchants with those card details.