Items can be saved by tapping the small arrow in the upper right corner of any post, which also has tools for unfollowing content and removing content from the Facebook feed.
You can view the items you saved at any time by going to your saved items in the "More" tab on mobile or by clicking the link on the left hand side of Facebook on the web.According to Facebook, users will receive reminders of saved items within their News Feeds, which makes the content easy to access.
Your saved items list is organized by category and you can swipe right on each item to share it with your friends or move it into your archive list.
"Save" for Facebook is rolling out to users beginning today. The Facebook app for iOS can be downloaded from the App Store for free. [Direct Link]