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
Lead Qualification and Filtering is the process of determining whether a lead is ready to be passed on to sales based on things like customer demographics and behaviours. Some leads will be filtered out, because they are not yet at that stage or appear less promising than others – focussing on unqualified leads is a waste of time and resources. Customer relationship management (CRM) software can be used to track and evaluate leads before distributing them to sales.
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.