Google Search Launching Signed Exchanges For Desktop Users

In the coming weeks, Google will be launching Signed Exchanges in Google Search for desktop users. This primarily impacts sites that utilities dynamic serving with the vary user-agent header but should not impact sites using responsive web design or separate mobile and desktop URLs.

Sites using dynamic serving (varying by User-Agent header) will need to annotate their pages as mobile- or desktop-only, as documented here.

If you are using dynamic serving and want to use signed exchanges, there is nothing for you to do. If you are using dynamic serving and do not want to use signed exchanges, you can opt out with the meta tag.