iCloud Photo Library is a great program to give you the same user experience on all of your Apple devices (e.g., iPhone, Apple computer, www.iCloud.com). You have uniform experiences with all versions, so you feel more confident and knowledgeable. And the beautiful option is that your photos are stored on the hardware devices you select but also on the cloud-based version. All your devices can automatically upload to the cloud. If anything fails, your photos are backed up, safe and secure. Apple takes care of your photo system with great care and expertise.