The reality of GDPR has made data privacy a hot topic these days. California will soon implement similar policies, and it’s likely other states will follow. So how do you make the most of the data you have, while still safeguarding the privacy of your customers and leads? Opt-in advertising for lead generation. The key lies in encryption and the use of hashed data to build an efficient email list. It’s a win-win: you keep your customer data safe and secure, and in doing so, provide yourself with a method of lead generation that’s more efficient and cost-effective than anything else out there. Here’s how opt-in advertising for lead generation works: