In the Search Engine Optimization (SEO) field there has been some talk lately of boosting your Google rankings with search volume through social media such as Google + and Twitter. Basically what this means is that the number of people searching for the exact same link and the click through rate of websites in the search results will affect the rankings on Google.
As shown in an SEOmoz case study, the search volume may affect the page ranking for more specific topics, but does not have a noticeable effect on general topics. For example Compete on Web when searched for “blog compete” does not show up on the first page of Google. However “blog compete on web” shows up as number 6 on Google search.
The SEOmoz study indicates that if more people search for the same exact topic (i.e. blog compete on web) and then click on the same link, then this will cause the link to appear in a higher position. If the link is posted on Google + and Twitter the number of people who repost or retweet also may have an effect on the ranking.
You can find out more about this study performed by Rand Fishkin at SEOmoz.