iCloud Photos provides a great service. Deeply embedded into iOS, iPadOS, macOS, and iCloud, with the feature enabled, every photo you take and every video you record is automatically uploaded to your central iCloud account and then synchronized as a thumbnail or full-resolution image to all your devices linked to the same iCloud account that also have iCloud Photos enabled.
As photo collections grow, some people balk at paying Apple for increasing amounts of iCloud storage, however, and they don’t need or want synchronization across all their devices in quite this way.
You can shed the iCloud part of iCloud Photos and stick just to Photos if you like. You can then opt to sync a different way if you still want that feature—and at no cost.
