What is a fragment URL

A fragment URL specifies a location within a page.

Any URL that contains a # character is a fragment URL.
The portion of the URL to the left of the # identifies a resource that can be downloaded by a browser and the portion on the right, known as the fragment identifier, specifies a location within the resource:
In the example above the "print" is a fragment.

In HTML documents, the browser looks for an anchor tag <a> with a name attribute matching the fragment. For example, in the URL shown above the browser finds a matching tag in the Printing Support heading:

<h3><a id="print"></a>Printing</h3>

and scrolls the page to display that section "Printing".

If you want to test how your site handle URLs with fragment, you can run a URL test in ExperiorTools.