Today we are rolling out support in Google Search’s AMP web results (also known as “blue links”) to link to signed exchanges, an emerging new feature of the web enabled by the IETF web packaging specification. Signed exchanges enable displaying the publisher’s domain when content is instantly loaded via Google Search. This is available in browsers that support the necessary web platform feature—as of the time of writing, Google Chrome—and availability will expand to include other browsers as they gain support (e.g. the upcoming version of Microsoft Edge).
Background on AMP’s instant loading
One of AMP's biggest user benefits has been the unique ability to instantly load AMP web pages that users click on in Google Search. Near-instant loading works by requesting content ahead of time, balancing the likelihood of a user clicking on a result with device and network constraints–and doing it in a privacy-sensitive way.
We believe that privacy-preserving instant loading web content is a transformative user experience, but in order to accomplish this, we had to make trade-offs; namely, the URLs displayed in browser address bars begin with google.com/amp, as a consequence of being shown in the Google AMP Viewer, rather than display the domain of the publisher. We heard both user and publisher feedback over this, and last year we identified a web platform innovation that provides a solution that shows the content’s original URL while still retaining AMP's instant loading.
Introducing signed exchanges
A signed exchange is a file format, defined in the web packaging specification, that allows the browser to trust a document as if it belongs to your origin. This allows you to use first-party