Slug
A WordPress slug is the URL-friendly text identifier associated with content, taxonomy terms and other objects.
Slugs normally use lowercase letters, numbers and hyphens and can form part of a permalink or archive address.
The URL-friendly identifier WordPress stores
Slugs normally use lowercase letters, numbers and hyphens and can form part of a permalink or archive address. In practical terms, Slug belongs to the publishing and site-management layer. Knowing that layer is important because it tells you what the term can change, what it cannot change, and where to look when something behaves unexpectedly.
Turning a title into a path segment
A page titled About Our Studio might use the slug about-studio in its URL.
Where slugs affect permalinks and queries
You do not need to memorize the term in isolation. It becomes useful when you can recognize it in the tool, browser, file or conversation where the concept is doing real work.
A Slug is not the full Permalink
A WordPress slug is the URL-friendly text identifier associated with content, taxonomy terms and other objects. By contrast, A permalink is the stable URL used to address a specific piece of website content. The two can appear in the same project, but they describe different parts of the work and should not be used as interchangeable labels.
The mistake: changing slugs without considering redirects
The common mistake is to use Slug as if it also meant Permalink. That blurs two separate decisions and usually sends troubleshooting in the wrong direction. A better test is practical: Changing a published slug changes the URL, so add a redirect when an old address may already be linked or indexed.
Why stable identifiers protect links
In day-to-day work, Slug matters when the concept needs to be identified precisely instead of being grouped with a nearby term. The practical value is not the vocabulary itself; it is being able to identify the right control, file, setting or decision when the concept becomes relevant.
A page titled About Our Studio might use the slug about-studio in its URL. That example is useful because it turns the definition into something you can recognize, test and discuss with other people working on the same project.
Related terms worth learning next
Sources and further reading
Use these references when you need documentation-level detail, specifications or product-specific behavior beyond the plain-English explanation above.