...
When you create a page and save it as a draft, the alias is automatically created based on the page title (with words like ‘the' and ‘a’ removed).
...
Only edit an alias – don't delete it. If the main alias for a page is deleted, it will display the CMS page path will be the node number in the URL on the live site and external links to the page will be broken.
Before you edit an alias, it’s a good idea to check if any redirects exist for that alias and review whether these need any changes. Redirects from a CMS page to another CMS page in the same CMS instance are usually based on the node, so may not need to be updated if the alias is changed.
How to edit an alias
Search for the page that needs to be edited, using content.vic.gov.au
Click on the Content tab and add the page title or keywords into the Title field, and select Filter.
Once you find your page, click on the page Title to open the page.
You’ll be able to check the current url alias for the page, for example, https://content.vic.gov.au/site-4/publishing-pages-on-vicgovau
...
In the Filter aliases field, type or paste the current url for the page from forward slash site-4 (for example, /site-4/how-publish-content-vic.govau, though you don’t have to include the site number to search), then click Filter.
...
Choose your page from the list and click Edit.
...
You'll see 2 fields: System path and the URL alias. Leave Don’t edit the System path as the node number. This shouldn’t be updated as it’s field; this is the unique CMS identifier (node number) for the page.
Type the new alias into the URL alias field (for example /site-4/publishing-pages-vic-gov-websites) and click Save.
Note: do not remove /site-4/ from the beginning of the urlURL.
...
Your URL should now be updated. You can check this by refreshing the CMS version of the page.
...