What does it mean?
As a web developer, an action hook is a specific point in the code where developers can insert their own custom code to modify or extend the functionality of a WordPress website. Action hooks are used to trigger specific actions or events within the WordPress core, such as when a post is published or when a user logs in. By using action hooks, developers can add their own custom code to these events, allowing them to modify the behavior of the website without having to modify the core WordPress code. This makes it easier to maintain the website and ensures that any customizations made by developers are not lost during updates or upgrades. Overall, action hooks are a powerful tool for WordPress developers, allowing them to create custom functionality and enhance the user experience of a website.