Stock content refers to pre-existing media, such as images, videos, and music, that can be licensed for use in various projects. This content is created by professionals and made available through online platforms, allowing users to purchase or download it for their own needs. Using stock content can save time and resources, as it eliminates the need for custom production. It is commonly used in advertising, social media, and web design, providing a cost-effective solution for individuals and businesses looking to enhance their visual and auditory materials.