DIAGNOSIS The Motion Zones or Smart Alerts are likely misconfigured, or the camera is placed in a high-traffic area causing alert fatigue.
FIX In the Ring app, go to the device's Motion Settings. First, tap 'Record Motion' to ensure it's on. Then, open Motion Zones and draw a zone that covers the area you care about. Make sure 'People Only Mode' is OFF if you want all motion.
IF THAT DIDN'T WORK The camera might be too high or at a bad angle. For optimal PIR sensor detection, mount it 7-8 feet high, angled slightly downward, with a clear view of the walking path, not a wide static wall.
HEADS UP If you have a Subscription, check 'Smart Alerts' aren't filtering events. Also, after changing settings, wait a few minutes and test by walking through the zone—live view isn't the same as motion-triggered recording.