Enhanced Conversions Google Ads: How to Hash Phone Numbers in GTM

In this video, I'll show you Enhanced Conversions Google Ads: How to Hash Phone Numbers in GTM.
Google ads enhanced conversions requires phone numbers to be hashed using SHA256 before they are sent — and if your enhanced conversions google ads setup is passing raw unformatted phone numbers, your match quality score will be low even when the data looks correct in GTM.
Most google tag manager enhanced conversions setups get phone hashing wrong because the formatting rules are strict. For google ads enhanced conversions to match correctly, the phone number must be in E.164 format with country code, stripped of all spaces and special characters, and then SHA256 hashed before it reaches the google ads conversion tracking tag.
You will learn the exact E.164 phone number format required for enhanced conversions google ads, how to write a custom javascript variable in google tag manager to normalize and SHA256 hash phone numbers automatically, how to test the hashed output using GTM preview mode, and how to verify improved match quality inside Google Ads diagnostics.
Getting phone number hashing right for enhanced conversions improves your google ads conversion tracking match rate, strengthens first-party data quality scores alongside hashed email, and gives Google's algorithm more consistent signals to optimize toward your highest-value customers.

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→ Marketing agencies managing client ad accounts
→ In-house marketers running Google or Meta Ads
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Step-by-step blog tutorial with screenshots:
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Видео Enhanced Conversions Google Ads: How to Hash Phone Numbers in GTM канала Md Zubayer Islam | Server-Side Tracking Specialist