Does it really help in your business? This may help you to understand more. Check this out:

1. What is Lead
Geneartion?
LeadGenerationPresentation|

2. In marketing, lead generation (/ˈliːd/) 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.
Source: https://en.wikipedia.org/wiki/Lead_generation#Online_lead_generation

3. How important is Lead
Generation?
It generating quality leads that
convert into prospects turns into
potential customers may also help
them to increase sales.