A marketing funnel is a method of breaking down the customer journey from the "awareness" stage (when they first hear about your product) to the "purchase" stage (when they're ready to buy your product or service). Post-purchase follow-ups, as well as cross- and up-sells, are frequently included in funnels.
Marketing funnels are designed to establish a more scientific and quantifiable method to guiding potential prospects down into your company bucket. The final objective is to convert them into lifetime customers and, eventually, evangelists for your products and services.
Because not every prospect will follow your route to conversion, you will most likely lose people at each stage of your funnel, which is why it narrows towards the bottom.
Are You Optimizing Your SaaS Conversion Funnel?
Top of Funnel (TOF) Content and Distribution