where does joomla store the website details
Joomla stores the site details in the configuration.php file in the root
of your Joomla installation, and it stores most page content in the database.
The site’s images are usually kept in the images folder rather than the
database.
Where the main details live
The configuration.php file holds important settings such as the site name,
database login details, paths, and other core configuration values. It sits in
the top-level Joomla folder, often in public_html, htdocs, or www
depending on your hosting setup.
Where content is stored
Most pages, articles, menus, modules, categories, and user-related data are stored in the Joomla database, not as separate page files. Joomla builds the page dynamically by pulling records from the database when someone visits the site.
Files and folders
A Joomla site also has folders for things like:
administratorfor backend admin files.mediaorimagesfor uploaded assets.cachefor temporary performance files.logsfor error and activity logs.
Quick answer
If you mean the website settings , look in configuration.php. If you
mean the actual content of the site, look in the database.