What is action and filter hooks ?

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Accepted Answer

Action and filter hooks are mechanisms in WordPress that allow developers to modify or add functionality to a theme or plugin.

Action hooks allow you to execute custom code at specific points in the WordPress execution process.
Filter hooks allow you to modify data before it is displayed or processed by WordPress.
Hooks are used by adding functions to them, which are triggered when the hook is executed.
Actions and filters provide a way to extend and customize WordPress without modifying core files.
Example of an action hook: add_action('wp_footer', 'my_custom_function');
Example of a filter hook: add_filter('the_title', 'my_custom_function');

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