Indicates that the resource has not been modified since the version specified by the request headers.
What does HTTP 304 mean?
The 304 Not Modified code is part of the 3XX class. This is a redirection code — the client must take further action, usually following a new URL.
When is it used?
A server returns 304 Not Modified in situations matching the definition above. You will encounter it inspecting network requests, reading logs, or testing an API. Whether it signals a problem depends on its class: 2xx and 3xx are normal, while 4xx and 5xx usually need attention on the client or server respectively.