iCloud Photo Library lets you store all your pictures and videos online but still have fast, local access on your iPhone and iPad.

It does that by uploading everything you take with or save to your iPhone or iPad and downloading everything you import on your Mac. You can either keep all of it on your device, or you can let iCloud Photo Library intelligently manage your storage for you, keeping recent, favorite, and frequently accessed pictures and videos available and leaving older and seldom accessed content up on the cloud, just a tap away. It also serves as a backup and syncs your non-destructive edits. In other words, iCloud Photo Library helps you make the most of your pictures, videos, and your devices. All you have to do is enable it!

How to enable iCloud Photo Library on your iPhone or iPad

  1. Launch the Settings on your iPhone or iPad .
  2. Tap on iCloud.
  3. Tap on Photos.
  4. Turn On the option for iCloud Photo Library at the top.

If you've been syncing photos through iTunes, you'll get a warning saying those photos will be removed. Photos for OS X will make sure those same pictures and videos are still available to you, as long as you're using it, but keep in mind you'll no longer be able to sync over a cable. iCloud Photo Library will be managing all your pictures and videos, and making them all available to you, from now on.