Business. Assign a value to all your existing customer information what information is worth keeping? What information affects the way you do business? Take a look at everything you've done in the past year and what insights you've used to industry leads target and sell to people. This can help you predict which information will have.
The industry leads most significant impact in the future. The question to ask yourself: "Does this information affect how I should talk to this person?" “the actions your customers show will tell you what information to keep. If they've purchased from you before, that purchase history affects what you offer them next if they fill out.
Specific form on your website, that's information you know is relevant s' they opened certain types of emails more than others, you industry leads can use this to segment your communication with them if they mentioned issues they want to fix, you can use this information to target emails , content and products that will help you have you.