Each tracking option is turned on by default for the Professions you have learned. If you want to turn on more than what you have learned, you can change those Load options for the each section.
Herbalism
Tracking all quality levels of current Herbs.
Mining
Tracking all quality levels of current Ores
Skinning
Tracking all quality levels of current Leathers, Scales and extra items that Skinners are able to collect
Tailoring
Tracking all quality of the different cloths, and spools.
Enchanting
Tracking Enchanting Mats ( let me know if there is anything missing you would like tracked )
Leatherworking
Tracking Earthshine scales, Frostbite scales, Mireslush Hide, Stonecrust hide
Elemental: ( this one should be on for all professions )
Rousing Earth, Fire, Air, Frost, Order, Decay
Awakened Earth, Fire, Air, Frost, Order, Decay
Fishing:
Added Fish to tracker
This counts both items in your bags, as well as in your bank.