You can keep track of Source Groups in Home report.
This feature helps you to analyze what are the most popular articles within the audience of a specific source, compare current achievements with the ones a week ago. Filters help to realize which topic interests specific audience, and what to write about. It is convenient to quickly understand which articles need to be promoted based on its popularity from a specific source.
In order to use the filter, you need to tick the box of the necessary source.
After that the top line of the graph will show you the total traffic, the lower line - traffic of the selected source.
Top 15 articles will be adjusted by the system for that specific source. You can also choose the timeframe that you want to see the data for on top of the page, as usual.
To see source groups definitions, please, go to http://help.onthe.io/english/basic-information-about-the-system/basic-definitions