Trello is a visual project management tool that organizes work using boards, lists, and cards in a simple drag-and-drop interface based on the Kanban system. You create boards for projects, add lists to represent stages (like “To Do-Doing-Done”), and use cards for individual tasks that can include descriptions, due dates, checklists, attachments, labels, and team member assignments. Built-in automation through Butler handles repetitive tasks, while Power-Ups integrate hundreds of tools like Slack, Google Drive, and Microsoft Teams into your workflow. Used by over 4 million teams worldwide, Trello is free to start and stands out for its simplicity and ease of use—81% of customers chose it specifically for being intuitive and requiring virtually no learning curve, making it ideal for small to mid-sized teams who need quick visual organization without complicated software.