Google Ads · Best creative

Which Google Ads ad performs best?

The best Google Ads ad is the one with the lowest cost per conversion or highest conversion value per cost within its own ad group, with enough clicks to trust the difference. Adstudio ranks ads inside each ad group, shows the winning ad's headlines, descriptions and images, and keeps Search, Display and Demand Gen ads apart because they serve in different places.

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The numbers that matter

What to read first.

Cost / conversion by ad: Compared within one ad group, where ads share keywords and audience.
Conversion value / cost by ad: For value-optimized campaigns.
CTR by ad: A supporting signal; a high CTR with no conversions is not a winner.

The method

How to break it down.

01Pick the campaign type: ads are compared within one ad group, never across Search and Display.
02Rank the ads by the metric the campaign optimizes for.
03Check volume before calling a winner.
04Open the winner's text and assets to see what it does differently.

How Adstudio answers it

In the app, or from the AI you already use.

In the Adstudio assistant

The assistant reads ad-level performance, shows the ad's text and asset labels, and puts display, Demand Gen and video creatives on screen. It can rewrite an ad's text as a proposal on the verified Google path, applied only after you confirm.

From ChatGPT or Claude, over MCP

Over MCP, query_performance reads ad-level conversions and cost, and get_creatives returns the ads' content, so ChatGPT or Claude can compare ads within an ad group. Performance Max asset-group assets are not returned over MCP.

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Prompts

Copy one and ask.

“In each ad group of our main Search campaign, which ad has the best cost per conversion?”
“Show me the headlines of our three best Demand Gen ads by conversions.”

Limits

What Adstudio will not tell you.

Google does not report conversions per individual headline, so Adstudio compares ads, not single headlines.

FAQ

Questions people also ask.

Yes, for image, display, Demand Gen and video ads. Search ads are shown as text.

In the app, yes: asset groups and their assets. Over MCP, asset-group assets are not returned yet.

Creating an account costs nothing, but connecting an ad account needs a paid plan: Hobby at $19 a month, or Business at $39 per workspace a month. There is no trial, and the price does not depend on your ad spend.