Components and Heroes are for battle, Workers are for classic gold wow collecting resources and building buildings. The two resources you are going to be sending your workers to collect are gold, gathered from gold mines, and lumber, collected from trees.
Getting the maximum from your employees is key to funding a successful match, which means gathering gold and lumber as efficiently as you can. Each faction begins with five workers. Right off the bat, then you will want three on gold, one on timber, and one for construction. You will want to increase that amount to the maximum of five percent mine whenever you can, and at least four on timber.
There are some differences between the factions you'll want to be aware of, too. Orcs and Humans are functionally the same, with employees manually chopping down trees and disappearing into gold mines to collect gold, then walking back the resources to your Hall building. Therefore, you are going to want Halls as close to gold mines as you can. If, for any reason, you have to build one further than the minimum space, you'll want over the five workers to make up for the missing time.
Night Elf employees, called Wisps, want to Entangle a Gold Mine to gather from it, which takes 60 seconds. Once built, Wisps could be'loaded' to the mine, gathering gold without needing to move. Being the environmental sort, they likewise don't ruin trees while collecting lumber, similar to the other factions. Pop a wisp onto a tree, and it is going to float around gathering lumber for the rest of the match.
The Undead also have a special gold structure -- a Haunted Gold Mine. Like Night Elf Wisps, Undead Acolytes remain about the mine and gather mechanically. In 100 seconds, construction one is slower than the Entangled Gold Mine, however, Undead Acolytes don't need to stay around in 1 place to construct, instead summoning a portal site that attracts their constructions into existence. When the portal is summoned, they're free to best place to buy wow classic gold start other jobs.