Many small businesses have to hire outside help. Some businesses, like a coffee shop or store, may have had employees from the start. Other businesses find themselves in the position of having to hire outside workers as their business grows over time. However you get there, if you hire workers, you will need to learn the legal rules that govern the relationship between employers and the employees or independent contractors they hire.
There are numerous laws and regulations that come into play when you hire workers--from discrimination laws to IRS rules about classifying workers. You will need to familiarize yourself with the basics so you don't run afoul of the federal, state, IRS, and other rules that govern this area.