How to configure Social Media Sharing plugin?
Go to Admin Area > Plugins > Installed Plugins.1)
Find the Social Sharing plugin - move mouse cursor over it, and click the Settings button.
You will be directed to the Social Media Sharing plugin management page.
At first you should create an account at https://www.addthis.com/ if you don't have it.
Follow the link:
https://www.addthis.com/register?next=/settings/publisher
Enter your email and password.
Click Register.
Then add a profile by clicking the Add profile button.
Enter your profile name to the Name this profile field.
Click Add.
The page with the profile name and ID opens.
Copy the ID and enter it to Admin area > Plugins > Installed plugins > Social media sharing > AddThis Profile ID field.
To choose the services for the plugin check the boxes in the Social Services table.
In the Preview picture area you can add the image for the content without images.