NEW YORK—Google Inc. showed off its plans to create a digital wallet that will allow consumers with Android smartphones to pay for goods and services or receive coupons and offers by waving the device in front of a special reader at the checkout counter.

The Web search giant took the wraps off Google Wallet and Google Offers, which will launch in the summer. The platform is powered by a technology called near-field communication, or NFC, which is compatible with newer point-of-sale terminals.

Google...