A Kanban board is a visual workflow tool that organizes tasks into columns, typically representing stages such as "To Do," "In Progress," and "Done." In the provided example, each column is a list that holds task items. By configuring SortableJS with the same group value for each list, you enable tasks to be dragged and dropped not only within a single column but also between columns. This group connection is essential for supporting the movement of tasks across the board. When you drag a task from one column and drop it into another, SortableJS recognizes the shared group and updates the lists accordingly, making the Kanban board interactive and dynamic.