What is WP_DEBUG and why should I enable it?

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Grade: Education Subject: Support
What is WP_DEBUG and why should I enable it?
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WP_DEBUG is a WordPress constant that enables or disables the display of PHP error messages on your website. Enabling it is crucial for troubleshooting 'Call to undefined function' errors. It provides valuable information about what's going wrong and helps you pinpoint the cause of the error. You should enable it in your `wp-config.php` file by adding `define( 'WP_DEBUG', true );`.