Clearly, there has been a huge change in the traditional buying process. In fact, according to Forrester, buyers might be anywhere from two-thirds to 90% of the way through their buying journey before they even reach the vendor. The reason this is happening more and more is because buyers have so much access to information that they can delay talking to sales until they are experts themselves.
Leads may come from various sources or activities, for example, digitally via the Internet, through personal referrals, through telephone calls either by the company or telemarketers, through advertisements, and events. A 2015 study found that 89% of respondents cited email as the most-used channel for generating leads, followed by content marketing, search engine, and finally events. A study from 2014 found that direct traffic, search engines, and web referrals were the three most popular online channels for lead generation, accounting for 93% of leads.