Trello is a web-based kanban-style project management application that enables teams to organize work using boards, lists, and cards. It provides a visual approach to task management where team members can collaborate by creating cards for tasks, moving them through customizable workflow stages, and adding comments, attachments, and due dates. The platform's intuitive interface makes it accessible for both technical and non-technical users, supporting various collaborative workflows from simple to-do lists to complex project coordination. Trello's flexibility and ease of use have made it popular across diverse domains including software development, marketing campaigns, and educational project management.