Autobuild has many settings. Generally, when running an economy you typically want a certain % of your pops/workers to work on something. For example, by default you need 1 hydroponics farm for 100 pop. That means you need 1% of your pop as farms. The autobuild can target that.
Similarly, maybe you want 20% of your workers to work in components factory. Then you can % worker share to achieve that.
Finally, since your industrial power scales with workers, buildings without a worker demand (such as glass smelter) can be set a % of workers target to make sure it stays correlated to it.
Viewing post in Auto building
you can ensure your resources do not go negative by using the autobuilder resource limit, which sets what percentage of your storages is the new minimum so you don't autobuild below it (also for the comment asking for the cheat sheet for the autobuilder, I think it's obvious now with the new systems if you have them but your autobuild statistics will change as you progress, like right now I've lowered my required farms to 1 per 50 people instead of 1 per 100, and my glass smelters only need to be 80% what it used to be thanks to RWG, a cheat sheet isn't viable when the exact numbers are highly variable depending on your exact situation)