Data annotation is work where you help train AI by reviewing and labeling things like text, images, or audio. That could mean comparing two AI answers and explaining which is better or checking whether a response follows instructions. You get paid by applying to companies that hire people to review and improve AI. You’ll usually submit your résumé and complete a skills assessment. If accepted and assigned work, you complete tasks online and get paid hourly or per task. Rates and available work vary, so it’s best to treat it as extra income at first.