The article provides information on how to use the WordPress `add_rewrite_tag()` function to add a custom data in the URL of your website by calling it within an 'init' hook
The `add_rewrite_endpoint()` function in WordPress adds an endpoint to the rewrite system, allowing developers to create custom endpoints with specific rules and parameters
The `add_plugins_page()` function in WordPress allows developers to add a submenu page to the "Plugins" main menu, requiring specific capabilities and checking them before inclusion