What is aTop of the funnel(Tofu)

This is the uppermost and largest section of the sales funnel. It corresponds to the awareness stage of the buying process. This is the stage of the buyer's journey. The top of the funnel is where prospects with initial interest enter the sales process. They are then being screened to determine if they're the right match. The top of the funnel refers to sales and marketing activities that target prospects at the top of the funnel.