I guess my big question is - what is confusing about it? You have the email name and it mentions "Key whitepaper" and the link with the name of the file.
Are they not familiar with the campaigns you are running?
You could also modify this so it doesn't show the Trigger itself and customize it so it says
Lead Clicked on Key Paper: {{trigger.Name}}
as right now you have something like {{trigger.Trigger Name}} {{trigger.Name}} {{trigger.Link}}