WordPress.org

Install the WordPress plugin.

Option 1: Go to your WordPress plugin Panel click "Add New" search for "Google Ajax Rss feed". Click on the Install link on the far right under Actions. Cick the install button on the plugin page.

Option 2: Download it here. Go to plugins in your WordPress admin panel and click "Add New" select upload and browse for the plugin you just downloaded click "Install Now" to install the plugin.

Activate the plugin in your WordPress Admin panel under plugins

Once the plugin is activated you should see a widget in the widget section of the Appearance secion of your Admin Panel. Just drag and drop that in to your side bar and you are ready to go. If you do not have a side bar then the plugin will automaticly include the client code. You have to add google api key and site url for feed.

Check setup.