Your guide to gig work, whether it's your side hustle or main source of income

Delivering food or driving passengers for Uber isn't the only type of gig work anymore.

PIROSCHKA VAN DE WOUW/REUTERS

Gig work has never been more widespread — and more challenging.

Over the past decade and a half, millions of workers have become ride-hailing drivers for Uber or delivered groceries for Instacart. For some, it's a side-hustle, while others rely on it as their primary source of income.

The model is also expanding to new professions and types of work, as evidenced by Uber's AI training efforts.