What is a sales funnel?

A sales funnel (also referred to as purchase funnel, sales process, or revenue funnel) is a common marketing model that outlines an approximate customer journey from the moment they discover a company to the point of making a purchase.

This term defines all stages through which a business finds buyers, qualifies leads, and closes deals.
Typically, a sales funnel consists of multiple phases.

Depending on the specific sales model, the number of stages may differ. For example, the AIDA model assumes four steps:

Awareness – when a customer becomes aware of a service or product
Interest – when a client expresses interest in a service or product
Desire – when a customer decides he wants to buy a particular product
Action – when a client closes a deal

There are also some other models. For example, another common model is more advanced and divides a sales funnel into seven stages:

Awareness
Interest
Evaluation (when a customer compares a company and its products to competitors)
Decision
Purchase
Reevaluation (when a client decides whether to repurchase from a particular brand or not)
Repurchase

https://en.wikipedia.org/wiki/Purchase_funnel

https://entrepreneur.com/article/296526