A side hustle is any income-generating activity outside of your primary job, used to supplement your main earnings. Common examples include freelancing, tutoring, selling handmade goods, driving for rideshare services, or monetizing a skill or hobby. Side hustles are popular tools for paying down debt faster, building an emergency fund, or working toward financial independence. With the growth of the gig economy and digital platforms, starting a side hustle has become more accessible than ever.