DIAGNOSIS The Point is in setup mode, waiting to be paired. It's either new, was factory reset, or has lost its configuration from the main router.
FIX Open the Google Home app. It should automatically detect a new device ready to set up. If not, tap the '+' icon, then "Set up device," then "New device," and follow the prompts. Have your phone near the Point.
IF THAT DIDN'T WORK Force close the Google Home app and reopen it. If it still doesn't detect, reboot your primary Nest WiFi Router. Once the router is back online, the app should then see the pulsing Point.
HEADS UP A slow pulse means it's ready. A fast, alternating yellow-and-white pulse means it's having trouble connecting to the cloud or your network. For a fast pulse, power cycle the Point.