Save to a Single Place Across Devices
People may discover and land on your content via their phone, desktop, or tablet device. For a variety of reasons, they may not be ready to take immediate action, like making a purchase or reading/watching your content.
They may not have their credit card handy, they may want to do more research, or they may just need more time. With the Save button, these people can save what interests them to a private list in one place within Facebook that they can easily reference later.