Archive | Open Garden (en)

Open Media

Up to 75% of publisher traffic never makes it to audience extension. Here's how to plug the leaks

Sep 16, 2026

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3 min read

Up to 75% of publisher traffic never makes it to audience extension. Here's how to plug the leaks

Bot traffic, consent rates, browser protections, DMP syncing and DSP syncing each shave off part of the audience a publisher thinks it can sell.

Max Legrand

Retail media

Sep 16, 2026

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4 min read

Mealz puts Carrefour Belgium's grocery aisle inside ChatGPT and eyes conversational retail media

The Lille-based startup is also building an in-app AI assistant for French grocery cooperative Coopérative U, where brands could one day buy shopper intent rather than keywords.

AI for media

Laier wants to put daily optimization back at the center of media buying

Sep 9, 2026

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4 min read

Laier wants to put daily optimization back at the center of media buying

Two former Heroiks executives have wired an agent into the ad platforms to spot optimization moves, propose them, and push them live once a buyer approves.

Nicolas Jaimes

Open Media

Summer hits 2026: five ad tech stories that shape the fall agenda

Sep 2, 2026

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9 min read

Summer hits 2026: five ad tech stories that shape the fall agenda

From Nielsen's $2.15 billion bid for DoubleVerify to ChatGPT Ads landing in France, here is what each of the summer's moves says about where the market is heading.

Nicolas Jaimes

Retail media

Sep 1, 2026

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4 min read

Advertima wants in-store retail media held to digital's measurement standards

The Swiss vendor's computer vision counts who actually looks at a store screen, picks the next spot in real time and ties that exposure to a purchase – and it is now looking at France.

Nicolas Jaimes

AI for media

OpenAI switches on ChatGPT ads in France: five takeaways from six months of buildout

Aug 26, 2026

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5 min read

OpenAI switches on ChatGPT ads in France: five takeaways from six months of buildout

In six months OpenAI has turned a $60 CPM pilot into something close to a full ad platform, but nobody has yet shown the ads produce sales that would not have happened anyway.

Nicolas Jaimes

AI for media

IAB moves to measure AI agents' ad influence, but platforms still hold the evidence

Aug 25, 2026

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5 min read

IAB moves to measure AI agents' ad influence, but platforms still hold the evidence

Due Nov. 12, the framework has to define how to credit an ad an AI agent read on its way to a recommendation or a purchase, at the exact point where the signals between a crawl, a generated answer and a conversion stop connecting.

AI for media

AI Overviews are coming: an advertiser's homework before it hits France

Jul 15, 2026

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6 min read

AI Overviews are coming: an advertiser's homework before it hits France

Four priority moves to get ahead of Google's AI-generated answers, according to search and AI-visibility specialists

Nicolas Jaimes

Open Media

European Media Marketplace: Equativ pools European media and data to strengthen the Open Web

Jul 7, 2026

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3 min read

European Media Marketplace: Equativ pools European media and data to strengthen the Open Web

By bringing together the inventory, first-party data and activation technologies of major European media, telecom and e-commerce companies, Equativ wants to make the Open Web easier and more efficient to buy. Its European Media Marketplace promises standardized audience segments, cross-channel activation and more than 70% of advertisers’ budgets going toward working media.

Nicolas Jaimes