The Header Counter plugin provides a simple way to analyze the structure of your Obsidian notes by counting headers and generating header summaries. Users can easily determine the number of headers in their notes through a command palette action, and configure the plugin to count specific header levels up to a default of four. Notifications display the header count, and users can generate and paste a detailed header summary for better organization and overview. This plugin is useful for structuring notes and gaining insights into their hierarchical format.