A video sales letter funnel is a marketing tactic that's part of your sales process and uses a video sales letter to pitch a product or service to potential customers. The video is usually the first step in the funnel, and it is used to capture the attention of potential customers. If they are interested in the product or service, they will then be directed to a landing page where they can learn more about the product or service and purchase it. A VSL funnel can get very intricate by tagging people based on their actions or inactions and then sending them a series of emails.