To use Google Pay, your device must be running on Android 5.0 (Lollipop) or higher, and support near-field communication (NFC) and host card emulation (HCE) technology. NFC and HCE are both required for Google Pay to work for in store transactions. Check the Google Pay Help Centre for more information as Google may from time to time make changes to the operating system and device requirements.
To check if your phone can make contactless payments with Google Pay, see here.
If you have a Google Wear OS Wearable, you may also be able to use Google Pay with your Wearable. For more information on Google Wear OS, please visit wearos.google.com.