Some business owners are moving away from the term “marketing funnel” because they think it’s too mechanical or simplistic to describe the lead nurturing sequence by which customers move from awareness to purchase. I think it’s still a useful way to describe a complex process and it’s a good visual to imagine the entire process from start to finish.
If you're wondering what a sales funnel is, simply imagine a real-world funnel. At the top of that funnel, some substance is poured in, which filters down towards one finite destination. In sales, something similar occurs. At the top, lots of visitors arrive who may enter your funnel. However, unlike the real-world funnel, not all who enter the sales funnel will reemerge out from the other end.