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The add_menu_page function in WordPress is used to add a new top-level menu item in the admin dashboard. Here’s a breakdown of the parameters:

1. Page Title: The text displayed in the browser title when the menu page is active.
2. Menu Title: The text displayed on the menu item in the admin sidebar.
3. Capability: The required capability to access this menu item (e.g., manage_options).
4. Menu Slug: A unique identifier for the menu item, used in the URL.
5. Function: The function that displays the content of the page.
6. Icon URL: URL to the icon displayed in the menu (optional).
7. Position: The position in the menu order where this item should appear (optional).

Example:

add_menu_page(
    'My Page Title', // Page title
    'My Menu',       // Menu title
    'manage_options',// Capability
    'my_menu_slug',  // Menu slug
    'my_callback_function', // Function to display content
    '',              // Icon URL (optional)
    6                // Position (optional)
);

This creates a new menu item in the WordPress admin with the specified properties.