That said, the number of companies able to get these results is low, which Optify suggests shows an immaturity in the use of those channels.

According to the findings, Facebook drives the most traffic compared to Twitter and LinkedIn, but Twitter generates the most leads.

In fact, Twitter achieves a higher conversion rate (2.17%) than the average for all channels combined (1.6%) including organic and paid search. In comparison, LinkedIn and Facebook achieve conversion rates of 0.8% and 0.74% respectively.

But when it comes to the number of pageviews per visit, LinkedIn is the top performer with 2.48, followed by Facebook (1.94) and Twitter (1.51).

Social media breakdown

Overall though, organic search massively outperforms social in terms of traffic and leads.

Organic search drives 41% of traffic to B2B sites, of which Google accounts for 90%, while social contributes an average of only 5% of all traffic and leads.

However Google’s decision to encrypt search data has had a dramatic impact on the ability to track referrals – the rate of ‘not provided’ search terms has increased by 171% since its introduction and now accounts for one of every 2.5 visits from organic search.

There is a way to steal some of the ‘not provided’ data back though using this trick in Google Analytics.

The report also found that email shows high engagement rates with an average of 3.75 pageviews per visit, and achieves the highest comparative conversion rate at 2.9%. This trend is apparently increasing as more B2B marketers turn to email for lead nurturing as well as lead generation.

You can find out more on this topic in our blog post that gives five tips for building stronger B2B email relationships.

B2B conversion rates by source 2012

The data in this report was collected using Optify’s visitor and lead tracking software and includes only US .com sites with between 100 and 100,000 monthly visits.