In the left sidebar scroll down and click on “settings”: In the settings page scroll down to find “Connect With Facebook”. Select the Enable Facebook Share Functionality box. You will then be given the option to edit the text that appears.
For those of you seeing the “Share” option in your posts… That means that post is open to the public to see. If you have your profile settings set to “Friends”, then no one will be able to share your posts.
Rick’s answer: Your friends are right, Billie. Facebook no longer displays the “Share” button on posts that have their privacy levels set to “Friends”. Unfortunately, there’s no way to force the “Share” button to appear on posts that you mark as “Friends. That’s just the way it is now.
Facebook Help Team
If you share a post you see onto your friend’s Timeline, it will only appear on your friend’s Timeline, not on your own. However, you can also share a post you see onto your own Timeline for all of your Facebook friends to see. Why is ‘share’ sometimes not available?
You may not be able to share a memory if sharing wasn’t turned on for the original content or the memory isn’t shareable (example: posts by others on your timeline). Learn what audiences you can choose from when you share something.