The Comments social plugin lets users comment on any piece of content on your site.

2.3 Adding a Comments Box
2.3.1 Title.Specify a title for the plugin to be able to identify the plugin in back-end.
2.3.2 Publish.Choose whether to publish the plugin or not.
2.3.3 Rendering. Choose how to render the plugin.
2.3.4 Type of URL. By default, the plugin refers to the current page, but it is possible to link it to a different page by choosing the URL option and filling out the Url field.
2.3.5 Width. Define the width of the plugin in pixels.
2.3.6 Height. Define the height of the plugin in pixels.
2.3.7 Number of posts. Specify how many posts are displayed by default.