There are 2 kinds of social media settings:
1. Share button
They are under the post content.
Set in: Real > Theme Option > Social Networks: Share Buttons For Post
It is for click-to-SHARE-visitor’s-social-media, normally activate all, it will help to spread your site.
If you(site owner) don’t have some social media, it is OK.
2. Social link
They are on header bar or footer bar normally
Set in: Real > Theme Option > Social Networks: Your Social Media Links
It is of click-link to your(site owner) social media, you must have some.