The Trek Notes provide you with:
Distances
the distance between each point of interest or road junction and the one before it.
Directions
Which way to turn or what to do, such as take in the view and take a photo or two!
Facilities
Such as toilets, fuel, food, shops, picnic tables and fire pits.
Optional extras
These are choices for you; which may include additional views, points of interest or nearest town.