AMP, or Accelerated Mobile Pages, is a non-standard subset of HTML developed and pushed by Google. AMP pages are served from Google's servers, though designed to look like they're coming from the original publisher's site.
Herond automatically redirects AMP and similar pages to the publisher's page, which has privacy, security, usability and performance benefits.
When this feature is enabled, Herond also applies the same protection against Yandex Turbo Pages.
To toggle this feature, you can go to Herond://settings/shields and click Auto-redirect AMP pages.