For big corporates time is money, they believe that wasting time in filtering clients will reduce their sales teams efficiency thus they outsource lead generation activity. 

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.

Lead generation is the process of attracting leads (your potential customers) into a contact management or marketing software system with the hope of nurturing them throughout the buying process to help convince them about your offerings and then convert them into a paying customer. 

We apply various available methods to funnel most vital leads to our client's sales team so that they could do more in least possible time.