PhotoScan by Google Photos is a way you scan in your printed photos , yes some of you reading this still get and have printed photos , into your digital library.
It is very simple to do;
Download the PhotoScan App to your iOS device ( iPhone ) or your Android device (smartphone).
Once installed find a photo , position the photo in the screen of the smartphone , click the photo button then click on the four circles that appear on the screen and you are done.
Your photo will then be on your camera roll and or in Google Photos and remember with Google Photos it will be sorted by faces and places as well.