This week, AI stopped being a tool that helps you market and started becoming the place where marketing happens. Within 72 hours, Google rebuilt its entire ads and search stack around Gemini, OpenAI opened paid advertising inside ChatGPT to every US business, and the platforms marketers rely on every day — Meta, Snapchat, Klaviyo — shipped AI agents that plan, write, and send campaigns on their own. If you market a brand in Vietnam, or you are a foreign company entering Vietnam, this is the most consequential AI news in years. Here is what changed, and exactly what to do about it.
📊 The shift in numbers — May 2026
Sources: Google I/O & Google Marketing Live 2026; Decision Lab / MMA Vietnam; Ken Research. See links at the end.
The big idea: The interface is becoming AI. Customers increasingly ask an assistant instead of typing keywords, and the assistant decides what they see. The brands that win in Vietnam in 2026 will be the ones that are discoverable, citable, and buyable inside AI — not just ranked in a list of blue links.
The 4 stories that matter this week
There was a lot of noise. These four announcements are the ones that change how you actually plan and buy marketing — starting now.
OpenAI opens ChatGPT Ads to every US business
OpenAI opened its self-serve Ads Manager to all US advertisers, removed the minimum spend, and added cost-per-click (CPC) bidding alongside its impression-based model. It also shipped a measurement pixel and a Conversions API, so advertisers can track results the way they do on Meta and Google. With hundreds of millions of weekly users, ChatGPT is now a buyable advertising surface — and OpenAI has confirmed the pilot will expand to markets including Japan, South Korea, the UK, Mexico, and Brazil.
Google Marketing Live 2026: meet “Ask Advisor”
At Google Marketing Live (May 20), Google rebuilt its marketing stack around Gemini. The headline is Ask Advisor — a single agent that spans Google Ads, Analytics, Merchant Center, and the Google Marketing Platform. Ask a question in plain language and it can pull product details, launch a campaign, and compile a cross-platform performance report without you opening each tool. Google also expanded AI Max (now one year old) to Shopping, and introduced new Gemini-built ad formats inside Search. Ask Advisor is in beta for English-language accounts, rolling out more broadly later this year.
Google I/O 2026: AI Mode crosses 1 billion users
At Google I/O (May 19), Google said AI Mode has passed one billion monthly users and AI Overviews now reach more than 2.5 billion, with the search box getting its biggest redesign in 25 years to accept longer, conversational, multimodal queries. The catch for marketers: independent studies show AI Overviews can cut organic click-through by 15–46%, and roughly 93% of AI Mode searches end without a click to any website. Traffic you used to earn from ranking #1 is increasingly absorbed into the answer itself.
Meta, Snapchat, Klaviyo & Braze add AI agents
The platforms you already use are baking agents into the workflow. Meta launched AI connectors so you can manage Meta ads from external AI tools. Snapchat introduced AI Sponsored Snaps that let users chat directly with a brand’s AI agent. Klaviyo deepened its partnership with Anthropic to use Claude for writing and improving email campaigns, while Braze added agents that predict the best moment to send each individual message. Day-to-day execution — drafting, timing, segmenting — is increasingly automated.
The week at a glance
The old playbook vs the AI-era playbook
| Marketing job | ⚠ Old approach | ✓ AI-era approach |
|---|---|---|
| Search | Rank #1 for keywords | Be the source AI Overviews & ChatGPT cite |
| Paid ads | Manually tune keywords & bids | Brief an agent; feed it goals, feeds & creative |
| Content | Keyword-stuffed, broad articles | Specific, expert answers with clear claims |
| Email / CRM | Batch-and-blast on a fixed schedule | Agent-timed, personalised per recipient |
| Human edge | Doing the manual work | Strategy, offer, brand voice, local judgment |
What this means for marketing in Vietnam
Vietnam is not a spectator to this shift — it is one of the fastest adopters in the region. The opportunity is real, and so is the new rulebook foreign brands need to respect.