What are the implications of using remove_action and add_action functions in the Functions.php file of a WordPress theme?

Using the remove_action and add_action functions in the Functions.php file of a WordPress theme allows you to modify or remove existing actions hooked into specific WordPress hooks. This can be useful for customizing the functionality of your theme or plugins without directly editing their code.

// Remove an existing action
remove_action( 'hook_name', 'function_name', priority );

// Add a new action
add_action( 'hook_name', 'new_function_name', priority );