The Things3 Today plugin allows users to seamlessly integrate their task management from the Things3 app into their Obsidian workspace. It displays the 'Today' list directly within Obsidian and provides features to mark tasks as completed with a single click. The plugin automatically refreshes the task list every 30 seconds to ensure the tasks are up-to-date. With its clean interface, users can efficiently manage their tasks while keeping their note-taking workflow in Obsidian intact.