The Checkbox 3 states plugin enhances Obsidian's task management by introducing a third checkbox state for task lists. This feature is especially useful for users who need more nuanced tracking of their tasks. On desktop, users can toggle this third state by pressing SHIFT and clicking on a checkbox, while mobile and touch device users can activate it through a long press. Additionally, the plugin allows for customization of the checkbox colors, enabling users to set base and hover colors for the third state, making task management visually intuitive and more customizable.