It´s a new functionality that allows the users follow and fav the authors, tags and topics of their interest.

While following an author or tag, a page is built with all the articles from the last 30 days with chronological order where you can see if there is new content that hasn´t been read, or content that has already been read. 

Besides this, the users can receive alerts when there are new articles of those authors or tags.

These notifications may be through a browser´s alert, a daily newsletter or the native app (IOs or Android) for a push alert.