adm-zip is a popular Node.js library for handling ZIP archives. It provides a straightforward API to create, read, and modify zip files directly from JavaScript. Key features include adding files, folders, and entries from streams or buffers to archives, extracting files with control over encoding and file permissions, and updating existing ZIP files. This makes adm-zip ideal for tasks like bundling application assets, creating installers, and handling compressed data within Node.js environments.