Chadwick Martin Bailey, another expert market research firm, reported that up to 51 percent of Facebook users and 67 percent of Twitter fanatics will most like purchase recommendations from brands they are a fan or a follower of. Such is the impact of Social Media on lead generation and sales that revenues are expected to go up exponentially in the coming years according to experts like eMarketer in their report on the US Social Network Ad Revenues 2012-2015.
With the growth of the internet, the world has changed from one of information scarcity to one of information abundance.  In fact, according to Google chairman Eric Schmidt “there was 5 Exabytes of information created between the dawn of civilization and 2003, but that much information is now created every two days and the pace is rapidly increasing”.  
In marketing, lead generation is the initiation of consumer interest or enquiry into products or services of a business. Leads can be created for purposes such as list building, e-newsletter list acquisition or for sales leads. The methods for generating leads typically fall under the umbrella of advertising, but may also include non-paid sources such as organic search engine results or referrals from existing customers.[1]
×