An Issue Tracker is a tool used by teams to manage and monitor problems, tasks, or bugs in a project. It allows users to create, update, and prioritize issues, ensuring that nothing is overlooked. This system helps streamline communication among team members and provides a clear overview of the project's status. Typically, an issue tracker includes features like assigning tasks to specific team members, setting deadlines, and adding comments or attachments. Popular issue tracking tools include Jira, GitHub Issues, and Trello, which help teams collaborate effectively and maintain productivity throughout the project lifecycle.