Google Docs is a free, online word processing, spreadsheet, presentation, and form application that allows users to collaborate and share documents over the internet. Users can create accounts by providing an email address and password on docs.google.com. Once logged in, they can make new documents, presentations, or spreadsheets and choose whether to keep them private or share them with other users. Google Docs provides similar word processing and formatting tools to programs like Microsoft Word and allows real-time collaboration on files.