Welcome Lazyguy! Thank you for joining our forum!
To answer your question, let me give you a brief description of Google adsense. This is a program offered by Google to promote classified ads (Google Adwords, for example) that people have created to promote their sites. You can go to google and sign up for a google adsense account. Or, if you are using blogger.com, you can simply click on the adsense tab, sign up, and that will put the ads into your blog automatically. You can also change the size and location of the ad layout by going to your adsense account, click on adsense for content and you will be in ad layout code. Pick the options that you prefer, then copy the code in the box at the bottom of the page. You would then paste the code in your blog template.
For more information, check out Google Adsense Quick Tour.
If you have more questions, please let us know. Also, keep us posted on how you made out!
Good Luck!