Why check what template a Joomla site is running
Joomla has a smaller but loyal footprint compared to WordPress, with particular strength in government, education, and European business sites. Its templates play the same role WordPress themes do, and seeing which one a site uses is useful for anyone evaluating Joomla as a platform or researching what similar organizations have built.
How Joomla template detection actually works
Every Joomla template ships a templateDetails.xml manifest and is served from a predictable path — /templates/<template-name>/. The Websites Detector locates the site's active stylesheet reference under that path and extracts the template name directly from it, the same way a developer inspecting page source by hand would.
What you can do with the results
If you're weighing Joomla against other CMS options, seeing real templates in use on real sites is more useful than browsing a marketplace in the abstract. It's also a fast way to confirm what template a site you admire is running before deciding whether to buy or build something similar.
A note on limitations
Detection relies on the standard /templates/ path convention. Heavily customized installs that override this structure may not return a template name.