Enhanced conversions allow you to use consented first-party data to get a more accurate view of how users convert after engaging with your ads.
Google Enhanced conversion tracking is a feature that can increase the accuracy of your conversion measurement.
When a customer completes a conversion on your website, you may receive first-party customer data such as an email address, name, home address, and phone number.
This data can be captured in your conversion tracking tags, hashed, sent to Google in its hashed form, and then used to match your customers to Google accounts, which were signed into when they engaged with one of your ads. AdNabu supports the enhanced conversions feature in our Conversion Tracking app. You can also check this link about how to manually set up enhanced conversions in the Google Ads account?