Google Apps are a suite of cloud-based collaboration tools that allow users to create, edit, and share documents, spreadsheets, presentations, and other files from any device with an internet connection. Key features include real-time collaboration where multiple users can edit a file simultaneously, and services like Google Drive for file storage and sharing. Popular apps in the Google suite include Docs for word processing, Sheets for spreadsheets, Slides for presentations, Drive for file storage, Hangouts for communication, and Keep for note taking.