Why We Love advertising or marketing (And You Should, Too!)
https://www.scribd.com/document/412769391/20-Questions-You-Should-Always-Ask-About-clickfunnels-pricing-discount-Before-Buying-It
The purchase funnel, or paying for funnel, is actually a consumer centered advertising design which illustrates the theoretical consumer journey to the purchase of the products or services. In 1898, E. St. Elmo