Digital libraries are online collections of digital resources such as documents, images, videos, and audio files that are accessible to users over the internet. These libraries often provide users with tools for searching, browsing, and accessing the content stored within them. Digital libraries can serve a variety of purposes, including academic research, preservation of cultural heritage, and providing access to information for a wide range of users. Researchers in this area explore topics such as information retrieval, digital preservation, user interfaces, and metadata standards.