you can add Google ads to your website by following the below steps;
1.apply to Google AdSense.Google will then send you an email to verify your email address. Once you do that, your application will be sent to the Google AdSense team.
2.Configure Your Ads.Once your account is approved, you can log into your account to get the necessary HTML code to paste into your site.
3.Pasting the Google AdSense Code onto Your Blog or Web Page.Make sure that when you insert the code into your site, you insert it as HTML.
4.Entering Your PIN into the Google Site.When your earnings reach a certain amount for the first time, Google will send you a card by snail mail with a series of characters printed on it. You will need to log into your AdSense account and enter this series of characters, the PIN, before they will send you any payments.