: WordPress does not come with this file by default. It is created during the installation process.

// Debug off in production define( 'WP_DEBUG', false );

: Connect to your server using a secure FTP client like FileZilla. Download the file, make your changes using a plain text editor (like Notepad++ or VS Code), and upload it back to the root folder.

When a user requests a page from your site, WordPress reads this file first to establish a secure connection to your database. It pulls your content, theme layouts, and plugin options from there. The Role of wp-config-sample.php

: Start with the most restrictive configuration (400) and only increase permissions if absolutely necessary. Never set permissions to 777 — that gives everyone full read/write/execute access.