iCloud is built into every Apple device. With iCloud Photos, you can browse, search, and share all the photos and videos from any of your devices, whether they were taken yesterday or years ago. To save space on your devices, the original, full‑resolution photos you take are automatically uploaded to iCloud. You’ll still always have a lightweight version of every photo on your device, and you can download the originals whenever you need them. Shared Albums lets you create albums for trips, events, or whatever you want. Simply choose the friends and family members who can see, comment, and add their own photos and videos.
Apple iCloud Reviews