Create an Account on an Advertising Platform
Visit the home page of Google AdSense, Bing Ads or Infolinks – three of the largest online advertising platforms – and complete the account creation process. Wait for the platform to approve your account. Copy the HTML code supplied by the platform into your Windows clipboard.
Paste the Code Snippet in Your Blog’s HTML Code
Select Edit Appearance from the Account menu on your Tumblr dashboard. Click the Edit Theme button. Click the Edit HTML link to reveal your blog’s source code. Paste the HTML code snippet supplied by the ad platform into your blog’s source code at the place where you want the ad to appear. Click the Update Preview button and use the preview pane to check whether your ad displays correctly. Click the Save button to save and publish your changes.
