This is a great place to add your own custom Help text for a client. You can even customize it for different Admin panels. For example, you can add a different Help text for the Add New Post panel and another one for the Comments panel.

Here’s how you go about it:

To find what file you should add the action to, just check the address bar in your browser and add the load- prefix right before the file name. For example, if you wanted to add the custom Help text to the Add New Post panel, which has a file name of post-new.php, then you would use load-post-new.php as the parameter of the add_action function shown above.