Don't worry and keep asking questions.
Yes it is expensive.. I have the paid version, but it's a worthwhile addition.
It does what you've just seen, making a flight plan easier to understand for me.
It deals with Sids / Stars
Calculates Top Of Descent / Early Descents
Gives Airport Metars
Holds a flight log
Shows AI / Vatsim traffic
Outputs flight plans to iFly 737 and FSX GPS
Shows frequencies for Com and Nav for airports
Updates with Navigraph data
You can use it for aircraft checklists
Run the Display unit on a networked PC
Provides a graphical view at each stage of flight: top down at the start airfield, the departure, enroute, descent, arrival, airfield
I'm sure it has loads more features I'm yet to find.