A great way to relive vacations or journeys abroad, or to keep family, friends and loved ones on your mind, is to display photos of them. One of the best ways to do that is to set them as a background wallpaper or screensaver (or both) on your Mac. This is easily done, as long as you are syncing photos with iCloud on both your Mac and your iPhone and/or iPad.
iCloud Photo Library
The iCloud Photo Library was designed to let you easily sync your photos between all of your devices. If you have it enabled on your iPhone, then you can turn it on on your Mac or iPad and instantly access all the pictures you've taken with your iPhone. Additionally, any photo edits you perform on your Mac will immediately be reflected in those photos on your other devices.
Enabling iCloud Photo Library will let your photos automatically upload to your iCloud where they can be accessed by your Mac, iPad or any other device with access to it. To turn it on, head to Settings -> Photos and toggle it on.
Sharing photos with friends and family is arguably the main reason people take photos in the first place. There are countless methods of sharing photos - you could share a folder of photos on Dropbox, upload to Facebook or Flickr, add to your story on Instagram, and the list goes on. Each has its own take on photo sharing and some may suit you better than others, but if you have an iPhone or iPad, iCloud Photo Sharing is an excellent option.
While the ability to take quality photos has clearly become one of the most important features to smartphone users, the ease with which those photos are shared with friends, uploaded to the web and distributed across other devices has become a crucial ingredient as well. Apple sought to improve this aspect when it introduced iCloud Photo Library with iOS 8. At the time, rumor had it that Apple would do away with its existing service, My Photo Stream. The fact that this never happened and My Photo Stream is still alive and well has been the source of much confusion ever since.