These quests are a training tutorial in Tradeskilling. The rewards include most of the starting books along the way, a harvesting bag, and some nice gear to wear while crafting. It also gets you through the first nine levels of crating very quickly, and gives you an idea of what the nine tradeskill professions create.
With Game Update 43 you no longer receive a note to start this quest series.
During this series you will receive the recipe books artisan essentials volumes 2-7, enough coin to purchase the non-harvested supplies you'll need, as well as the Artisan's Tunic. The harvesting tutorial will reward you with a Disassembled Storage Box.
Here's your harvesting/shopping list for the whole Tradeskill Tutorial Series.
After you complete this series you can speak to your tutor about tradeskill related topics like:
For a full list of tradeskill professions see the Crafting Classes guide.
To choose your tradeskill professions, hail your local Crafting Trainer at levels 9 and 19.
There are Tradeskill quests to take you up to level 90. See: Tradeskill Quests