Diigo is a social bookmarking tool that allows users to save, organize, and share web pages. It enables individuals to highlight text, add sticky notes, and categorize their bookmarks with tags for easy retrieval. This makes it a useful resource for researchers, students, and anyone looking to manage online information efficiently. In addition to bookmarking, Diigo offers collaborative features, allowing users to create groups where they can share resources and discuss topics. This fosters a community-driven approach to information sharing, making it easier for users to discover new content and learn from one another.