Google officially launches AdSense for Feeds - Webmaster Share Station

With AdSense for Feeds, users can choose the frequency of ad display, position (top or bottom), color, channel, and track ad performance. Additionally, users can select the format of the ad unit; automatically, it defaults to 468×60 and 300×250. In most cases, the ads are displayed in a 300×250 size. However, when there is more content or when the user's feed is on a larger display, the ads will be shown in another format. The official explanation provided is: "We will automatically adjust the size of the ads displayed within the feed based on the length of the post content and the type of reader used by the user to view the feed." Overall, the ad unit settings are relatively user-friendly.