What's Holding Back the sales funnel understanding Industry?

https://foxtrot-wiki.win/index.php?title=The_Worst_Advice_We've_Ever_Heard_About_marketing_funnel_logo

A funnel is often a tube or pipe that is certainly extensive at the highest and slender at the bottom, employed for guiding liquid or powder into a little opening. Funnels are frequently made of chrome steel,