A "side hustle" refers to a secondary job or business that individuals engage in alongside their primary employment. It allows people to earn extra income, pursue passions, or develop new skills. Common side hustles include freelance work, online tutoring, or selling handmade products. Many people choose to start a side hustle to achieve financial goals, such as paying off debt or saving for a vacation. With the rise of the internet, platforms like Etsy and Upwork have made it easier for individuals to market their skills and products, turning hobbies into profitable ventures.