Medium This Hint is worth investigating further, and may warrant further attention depending on the type and quantity of URLs affected. Opportunity This Hint represents an opportunity for optimization.

Use HTTP/2 for all of its resources

This means that the URL in question does not use HTTP/2 for all first-party page resources.

Why is this important?

The HTTP/1.1 standard was officially released in 1997, and much has changed since then. HTTP/2 came out in 2015, and offers many benefits over HTTP/1.1, including binary headers, multiplexing and server push. However, it is only recently that HTTP/2 has gained widespread browser support, which has limited its impact.

Now, however, it has become a de facto performance recommendation. Simply put, HTTP/2 serves your page's resources faster and with less data moving over the wire.

What does the Hint check?

This Hint will trigger for any internal URL that contains first-party resources that are not served over HTTP/2.

How do you resolve this issue?

Upgrading to HTTP/2 requires server work, so this sort of work will typically need a developer to get involved. You may also need to contact your web hosting provider to ensure that;

  1. Your web server is able to support HTTP/2
  2. Your server is configured to use HTTP/2

Depending on your server and configuration, this may require additional work. On the flipside, if you use a CDN like Cloudflare it can be a lot easier to switch over to HTTP/2.

Further Reading

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