You can't directly turn on Google Photos' "Rediscover this day" feature. It's an automatic feature that Google Photos activates for users based on their photo library.
Here are some ways to potentially see "Rediscover this Day" notifications:
- Ensure you have a sufficient number of photos: Google Photos likely needs a sizable photo library to trigger this feature.
- Check your notification settings: Make sure you've enabled notifications for Google Photos.
- Use Google Photos regularly: The more you use Google Photos, the more likely you are to see these notifications.
Google Photos likely uses algorithms to determine when to show "Rediscover this Day" notifications based on your photo library and usage patterns. While you can't directly control it, you can increase your chances of seeing it by following the tips above.