Perfect way to allow others to use your content or you can use to place an ad on your own site. It really does not have to be a WordPress site! Here is the widget source that we will call hello-world.php: <div style=" display:table; border:3px solid #ccc; border-radius:.5em; padding:.5em; margin:0 auto;"> We say: <?php echo "Hello World"; ?> </div> To deliver the above content,