What can you do with it?
There are many use-cases for a html to markdown converter. For example:
Migrations made simple
Whether you want to move your Website, Blog or Wiki somewhere else, migrations are always annoying. Save time by converting the HTML-pages to markdown, which can easily be imported into many programs.
Comfortable reading
Websites are build with HTML, but sometimes you want a version without all the visual clutter. Many browsers feature a "Reader Mode". You can achieve a similar effect by converting the entire HTML page to Markdown.