The ultimate guide on using the iCloud Photo Library ...

RENE RITCHIE, IMORE:

With the iCloud Photo Library, all your photos are now available on all your Apple devices all of the time.

"To accomplish this, iCloud Photo Library works with Photos for iOS and Photos for OS X, as well as iCloud.com, as the glue that holds everything together. Shoot a video on your iPhone, take a picture with your iPad, import from your DSLR on your Mac, and all of it goes up to Apple's servers and is made available on all your other devices. Part backup, part sync, part storage optimizer, if you let it, iCloud Photo Library can make micromanaging your pictures and videos a thing of the past."

Read the guide here.