What does At risk limitations mean pertaining to a 1099-NEC job?

[VolvoGirl]

A 1099NEC is for self employment income and goes on schedule C.

If you have money NOT at risk of losing, you can not take a loss on schedule C. If you don't know what it means then probably All your Investment is at Risk (check Box 32a). It means you are using your own money for the business. People usually check the wrong box.

[SharonD007]

The question about At-Risk limitations (Schedule C Line 32) means that the business owner is personally liable for the business’s losses. 

Refer to the TurboTax article Is my business investment at risk? for more information.