Facebook is now offering advertisers new metrics about how their Sponsored Stories perform in News Feed, including the average position within the feed where the story was inserted.
This additional data will help advertisers understand how their ads are performing on the social network and how they might better optimize campaigns. Several early tests have found that News Feed-based ads have significantly higher clickthrough rates than sidebar ads. As Facebook provides data to show how well ads work within the feed, advertisers will increasingly want to run ads in that placement.
Read more details on this story at insidefacebook.