Enhanced conversions for leads use first-party user-provided data from your website to measure sales and transactions that happen off your website. If you run lead-generation campaigns to drive offline sales, enhanced conversions for leads can help you understand the impact of your ad spend. Unlike the current version of offline conversion tracking, this version of offline conversion tracking doesn’t require you to modify your lead forms or customer relations management (CRM) systems to store Google Click ID (GCLID). Instead, it uses user-provided data from your website leads to measure conversions.