To implement the AdSense ad code in your webpage, you'll need to edit the HTML code of your page. If you're not familiar with HTML, this section will give you a little background. It doesn't provide instructions for editing the HTML code; for instructions, head to Step 2: Paste the ad code in your page.
HTML (Hyper Text Markup Language) is the programming language in which webpages are written. This coding language is used on the Internet. Web browsers read and translate the HTML code in order to display the contents of a page.