The sales funnel is a marketing tool that helps businesses to build their customer base. It is the process of converting leads into customers, customers into repeat buyers and repeat buyers into long-term loyal customers. The sales funnel consists of four stages: awareness, interest, conversion and retention. The awareness stage is the first step and it involves informing your target audience about your brand or product. The interest stage is the next step where you try to capture the attention of your audience before they convert to a lead. A sales funnel is a process that takes potential customers through a series of steps to ultimately purchase a product. It starts with an initial contact and ends with the sale. The conversion rate is the percentage of people who complete the process from start to finish. There are four stages in building a sales funnel: Awareness, Interest, Desire and Action.