The Doing plugin helps users keep track of their ongoing tasks by displaying the current task in the Obsidian status bar. It also provides a logging feature that saves all tasks to a 'doing.md' file, allowing users to review their task history. This plugin is ideal for individuals who frequently switch between tasks and need a quick reminder of what they are currently working on. With its simple interface and easy-to-use features, the Doing plugin ensures that tasks are not forgotten and that progress can be tracked over time.