Google Data Strength: What's Behind Tag Gateway and the New Uplift Metric

Google has a new favorite term: data strength. In September 2026, Google Ads got a dedicated metric for it. On October 13, Google devoted almost its entire monthly Demand Gen drop to the topic, and the help page with Google's best practices was rewritten. The message: Google's AI is only as good as the data you give it.

This article explains what data strength is, what Google tag gateway and the new Data Strength Uplift metric do, how reliable Google's numbers are and what this means for lead generation businesses. As of October 2026.

Key points

• Data strength is Google's umbrella term for how completely your own data reaches Google Ads: tags, CRM data, customer data, click IDs.
• The new Data Strength Uplift metric estimates how many additional conversions your data setup makes visible. Google doesn't disclose how it's calculated.
• Google tag gateway loads the Google tag through your own domain. According to Google, this brings 14% more measured conversions on average, and over 20% in Demand Gen.
• Data Manager is coming to Google Analytics and Display & Video 360, with enhanced conversions to follow there soon.
• Google recommends at least three identifiers per conversion, for example gclid, IP address and hashed email or phone number.
• For lead generation, the biggest lever isn't the tag but CRM data: deals sent back to Google with gclid and hashed customer data.

What Google announced

In October, Google also shared a case study: after building its data strength, US insurance platform The Zebra saw 16% more conversions and 19% more conversion value.

What data strength is

Data strength isn't a score you can read off somewhere. It's Google's framework for a set of recommendations. The help page structures them in four steps:

1. Connect your data sources: Google tag on every page, upgrade to Google tag gateway, link Google Analytics with Google Ads, connect CRM and offline data via Data Manager.
2. Maximize your signals: send at least three identifiers per conversion and pass all conversion events, not just a selection.
3. Activate Google AI: Smart Bidding such as target ROAS or maximize conversion value, AI campaigns such as Performance Max and Demand Gen, first-party audiences.
4. Prove your ROI: incrementality experiments and marketing mix models such as Google's Meridian.

As signals, Google lists hashed email address and phone number, IP address, transaction ID, gclid, session attributes such as campaign ID, landing page and timestamp, and gbraid and wbraid for iOS.

Google tag gateway

Google tag gateway (formerly "first-party mode") no longer loads the Google tag from a Google domain but through a path on your own domain. Your CDN forwards the requests to Google. The easiest setup is with Cloudflare directly in the Google tag. Google also documents setups for Akamai, Fastly, Google Cloud and Amazon CloudFront (Google Tag Manager Help).

What it does: requests to your own domain are blocked less often by ad blockers and browser restrictions. Google reports 14% more measured conversions on average and up to 7% lower CPA, and over 20% in Demand Gen campaigns.

What it doesn't change: your consent obligations. Google itself points out that you should use Consent Mode and review your settings. Someone who doesn't give consent isn't treated differently just because the tag runs on your domain.

You may know the principle from server-side tracking: measurement data flows through a domain you control. The difference between browser and server approaches is covered in our article on client-side vs. server-side tracking.

The Data Strength Uplift metric

The new metric is meant to show in Google Ads how many additional conversions your data setup captures, for example "5% additional conversions in the past 14 days". That sounds useful, but there are two catches:

• No open methodology: Google doesn't disclose how the metric is calculated. You can't verify it independently.
• Measured isn't sold: the metric counts conversions that happened anyway but wouldn't have been measured without your setup. It says nothing about whether you win more customers.

The same goes for the percentages in Google's announcements. They're based on Google's own analyses over short or differing periods. As a direction they're plausible, as a forecast for your account they're not.

What this means for lead generation

Google's recommendations are strongly geared toward online stores, where the purchase happens on the website. In lead generation, the tag only sees half the story: the form. The real value is created days or weeks later in sales.

That's why the order is different for lead gen:

1. Send CRM deals to Google. When won deals reach Google with gclid and hashed customer data, bidding learns which clicks lead to customers. According to Google, enhanced conversions bring 11% more Search conversions on average compared to standard imports. How this works technically is covered in the article on the Google Data Manager API.
2. Send values. To optimize for revenue with value-based bidding, you need deal values, not just lead counts. More in the guide to real ROAS in lead generation.
3. Then improve the tag. Google tag gateway helps capture more form conversions and click IDs in the browser. That's worthwhile, but it's the second step.

What you should do now

• Check the data strength recommendations in Google Ads and watch the new metric, but don't read it as proof of success.
• Turn on enhanced conversions and accept the customer data terms.
• Send CRM deals daily, with gclid, hashed email and phone number, value and a stable transaction ID.
• Test Google tag gateway if your website runs on Cloudflare or another supported CDN, and review Consent Mode while you're at it.
• Keep your own reference: compare Google's measured conversions with the leads and deals in your CRM.

How LeadMetrics helps

LeadMetrics covers the part of data strength that matters most in lead generation: data from your CRM and payment providers back to Google.

• Deals to Google Ads: the Conversion API sends leads, purchases and won deals server-side to Google Ads, including deals that close weeks later in HubSpot or Close.
• gclid and customer data: every conversion is sent to Google with the gclid plus hashed email address and phone number, along with value and currency.
• gclid on the lead: the tracking script captures click IDs on the visit and matches them to the lead via session ID, email or phone number, up to 90 days back.
• Custom tracking domain: depending on your plan, the LeadMetrics script can be served from your own subdomain via CNAME.
• Log per lead: for every lead, you see which events were sent to Google.