If you would like to add or remove social media sharing tools from your blog posts, you should access the settings tab of the blog control panel.
You can check and uncheck the social media tools you would like to use in your posts. Any social media site that is checked will appear at the top of your blog posts for sharing.
Make sure to click save changes after you update the settings.
Below is an example of where the social media share icons appear on a live blog post: