Digital libraries are online repositories that provide access to a vast array of digital content, including books, articles, images, and multimedia. They serve as a bridge between traditional libraries and the digital world, making information more accessible to users around the globe. These libraries utilize technology to organize, preserve, and disseminate knowledge, often featuring advanced search capabilities and user-friendly interfaces. Notable examples include Project Gutenberg and Europeana, which offer free access to a wealth of resources, promoting education and research in the digital age.