1. Sign in to Blogger.com and click on the 'Settings' section for your blog. Click on the 'Monetize' tab and select 'AdSense Overview' from the menu below the tabs.
2. Chose one of the options for how AdSense will display. You can choose for ads to appear both in the sidebar and on the posts, just in the sidebar or just on the posts. Click in the circle next to your choice and click on the 'Next' button at the bottom of the page.
3. Click on 'View Blog' to see how the ads look on your blog. You can also choose 'AdSense Reports,' 'Switch [to a different] AdSense Account,' 'Customize/Add Ads' or 'Remove Ads.'