Having this option enabled will show the Facebook share button for sharing the comment link on your Facebook account.
For the Facebook button functionality you need to create a Facebook App ID first. Click on the link above, login to your Facebook account and click on the My Apps link in the menu.
Social Share Settings
Deeper Comments Settings Documentation
Social Share
Here you can manage social share.
1. Show/Hide Social Share Toggle (Comment's Footer Metadata Box)
Here you can enable or disable the ability for users to share a comment link in their social media or via their emails.
2. Facebook Share Button
Having this option enabled will show the Facebook share button for sharing the comment link on your Facebook account.
For the Facebook button functionality you need to create a Facebook App ID first. Click on the link above, login to your Facebook account and click on the My Apps link in the menu.
3. VK Share Button
Show/hide VK share button on share toggle menu.
4. Pinterest Share Button
Show/hide Pinterest share button on share toggle menu.
5. Get pocket Share Button
Show/hide Getpocket share button on share toggle menu.
6. Tumblr Share Button
Show/hide Tumblr share button on share toggle menu.
7. Reddit Share Button
Show/hide Reddit share button on share toggle menu.
8. WhatsApp Share Button
Show/hide WhatsApp share button on share toggle menu.
9. Telegram Share Button
Show/hide Telegram share button on share toggle menu.
10. Twitter Share Button
Having this option enabled will show the Twitter share button for sharing the comment link on your Twitter account.
11. Email Share Button
If you want users to be able to send a comment link through their email with only on click, this option must be enabled.