Lead scoring is a way to qualify leads quantitatively. Using this technique, leads are assigned a numerical value (or score) to determine where they fall on the scale from “interested” to “ready for a sale”. The criteria for these actions is completely up to you, but it must be uniform across your marketing and sales department so that everyone is working on the same scale. https://www.namanmodi.com/wp-content/uploads/2017/04/Building-a-Successful-Email-Marketing-Campaign_NamanModi-760x482-1.png
What's the difference between them? One-off communications versus prolonged, email-based interactions. For example, email marketing tools are excellent for one-off communications. You can use these tools for the one time you'd like to send someone an automated email response when they join a subscriber list, on their birthday, or when you promote a new product. But marketing automation tools are better suited for prolonged, email-based interactions. For example, you can use marketing automation tools whenever you want to guide someone from a subscriber list to a product purchase. Or you can send thank you emails or send new product promotions—all without having to lift a finger after the workflow is designed.
Online surveys: Consumers are asked to complete a survey, including their demographic information and product and lifestyle interests. This information is used as a sales lead for advertisers, who purchase the consumer's information if provided. The consumer may 'opt-in' to receive correspondence from the advertiser and is therefore considered a qualified lead.