Mashable.com recently published: What Social Media Ad Types Work Best?
A few tidbits that I found most interesting are:
- Regardless of format, the most effective advertisements were those that were related to the content on the publisher’s website (i.e. a soup advertisement on a cooking website).
- Of the seven advertising types, banner ads and newsletter links were the most successful at encouraging purchase intent.
- The study suggests that banner ads may be the best choice for advertisers that want to push a product. However, for campaigns that want to build engagement, corporate profiles or sponsored content is the better option.
Take a look at the entire article for the details: http://mashable.com/2010/03/30/social-media-ad-stats/