In order to configure social sharing links in Magento 2 Blog go to Stores > Configuration > Magefan Extensions > Blog and find the Social section.
- Enable AddThis in order to display social sharing buttons on the storefront.
- Enter the AddThis ID. In order to learn where to get the AddThis ID follow the link.
- Set the AddThis Language. ( it has to be two-character e.g. en, fr, de, nr )
Once you fill in all the corresponding fields and Save Config, you'll see the social sharing links on your blog posts.