Albums are digital containers of photos. Similar to bond photo albums, each digital album may contain a group of photos that are related to a certain theme or were taken at the same time frame.
By working with Albums you don't need to worry where the photos are physically stored (which folder) and information about photos are stored in a photo database, allowing you to find and work with photos quickly. Albums are also automatically created for you after you "Get Photos".
You can organize your photos more efficiently by using Albums, instead of letting the photos being scattered in different folders in the computer hard disk.