I was thinking that for new visitors the bounce rate might be lower, especially lower than from search, because someone browsing a social media site is probably not in search-and-find mode as much as they are already in a mood to look around.
Also, the link might be seen as more likely to be worthwhile - bookmarkworthy. Depending on the way the site is identified via the social media page, the linked content is sort of pre-identified as targeted and interesting information on a topic, possibly on the say-so of an authority.
This leads me to wonder if wanderers from social media are more likely to subscribe to a site's feed, for even more wandering later.
First time visitor > follows social media link > wanders or subscribes or both > wanders again later?
Edited by AbleReach, 03 November 2007 - 05:37 PM.