In a survey just released SEO has been credited as being the most viable and profitable source of lead generating for business to business companies. The survey results showed that it was twice as effective than any other form of online marketing or lead generation.
The survey results are a timely reminder to business owners about the important of SEO, you can read more here:
https://searchengineland.com/industry-survey-ppc-is-losing-ability-to-generate-leads-131805