how do you add an ad in html?
['Copy the serving code of the zone or a specific ad.', 'Go to the dashboard of your blog.', 'Click "Layout" tab to edit it.', 'Click "Add a Gadget" (either on the side or at the bottom)', 'Under the Basics list, choose the HTML/JavaScript.', 'Paste the serving code to the Content box, and click Save.']