How Did We Get Here? The History of marketing ucr Told Through Tweets
https://nanohub.org/members/239279/blog/2019/07/the-ultimate-cheat-sheet-on-clickfunnels-pricing-review
The purchase funnel, or obtaining funnel, is often a client centered marketing product which illustrates the theoretical client journey towards the acquisition of a product or service. In 1898, E. St. Elmo Lewis