Place IDs | Places API (New) | Google for Developers
...Page Summary Place IDs are unique identifiers for places in the Google Places database and are used across various Google Maps Platform APIs. You can find Place IDs using the Place ID finder or by searching for places using the Places API. Place IDs can be stored and reused, but it's recommended to refresh them if they are over 12 months old....
https://developers.google.com/maps/documentation/places/web-service/place-id
Place IDs | Maps JavaScript API | Google for Developers
...Place IDs are unique text identifiers for places in the Google Places database and are used across multiple Google Maps Platform APIs. You can find a place's ID using the provided Place ID finder or by searching for the place using the Places API or Places library. Place IDs can be stored for later use and should be refreshed if older than 12 months using a Place Details request. Invalid or ......
https://developers.google.com/maps/documentation/javascript/place-id