The information column usually displays where the action is taking place. To reference your screenshot, the third row has an action of Course view and the information column has Moodle Features Demo. The Course view action is a log referencing that the user (which appears in Full Name column) was on the course homepage. Moodle Features Demo is just referencing the name of the course.
The numbers though are a little harder to explain. Since Moodle is open-source, anyone can write a plugin. With anyone being able to write their own plugin, there may be some loss of consistency as to what shows up in the reports. I am not familiar with the Hotpot module so I can't say exactly what that specific action is.
Happy oodling!