Hello Will Roberts !

The cut from the manual here https://github.com/unaio/una/wiki/Timeline 

Hot Feed is a timeline which isn't displayed anywhere by default but is available in Studio -> Pages builder. This timeline allows to show the most recent, commented and voted events in a separate timeline block. It can be shown on any page you want. Note. To use the feature you need to activate hot list aggregation in Studio -> Timeline -> Settings and put Hot Feed (Timeline) or Hot Feed (Outline) on necessary page.